diff --git a/platformio.ini b/platformio.ini
index bb68e981f..fe4893b69 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -33,6 +33,7 @@ env_default = sonoff
 ;env_default = sonoff-PL
 ;env_default = sonoff-PT
 ;env_default = sonoff-RU
+;env_default = sonoff-SV
 ;env_default = sonoff-TR
 ;env_default = sonoff-TW
 ;env_default = sonoff-UK
@@ -409,6 +410,20 @@ upload_resetmethod = ${common.upload_resetmethod}
 upload_speed = ${common.upload_speed}
 extra_scripts = ${common.extra_scripts}
 
+[env:sonoff-SV]
+platform = ${common.platform}
+framework = ${common.framework}
+board = ${common.board}
+board_build.flash_mode = ${common.board_build.flash_mode}
+board_build.f_cpu = ${common.board_build.f_cpu}
+build_unflags = ${common.build_unflags}
+build_flags = ${common.build_flags} -DMY_LANGUAGE=sv-SE
+monitor_speed = ${common.monitor_speed}
+upload_port = ${common.upload_port}
+upload_resetmethod = ${common.upload_resetmethod}
+upload_speed = ${common.upload_speed}
+extra_scripts = ${common.extra_scripts}
+
 [env:sonoff-TR]
 platform = ${common.platform}
 framework = ${common.framework}
diff --git a/sonoff/language/sv-SE.h b/sonoff/language/sv-SE.h
new file mode 100644
index 000000000..db8f663a1
--- /dev/null
+++ b/sonoff/language/sv-SE.h
@@ -0,0 +1,597 @@
+/*
+  sv-SE.h - localization for Swedish - Svenska for Sonoff-Tasmota
+
+  Copyright (C) 2018  Gunnar Norin
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _LANGUAGE_SV_SE_H_
+#define _LANGUAGE_SV_SE_H_
+
+/*************************** ATTENTION *******************************\
+ *
+ * Due to memory constraints only UTF-8 is supported.
+ * To save code space keep text as short as possible.
+ * Time and Date provided by SDK can not be localized (yet).
+ * Use online command StateText to translate ON, OFF, HOLD and TOGGLE.
+ * Use online command Prefix to translate cmnd, stat and tele.
+ *
+ * Updated until v6.2.1.11
+\*********************************************************************/
+
+//#define LANGUAGE_MODULE_NAME         // Enable to display "Module Generic" (ie Spanish), Disable to display "Generic Module" (ie English)
+// https://www.science.co.il/language/Locale-codes.php
+#define LANGUAGE_LCID 1053
+// HTML (ISO 639-1) Language Code
+#define D_HTML_LANGUAGE "sv"
+
+// "2017-03-07T11:08:02" - ISO8601:2004
+#define D_YEAR_MONTH_SEPARATOR "-"
+#define D_MONTH_DAY_SEPARATOR "-"
+#define D_DATE_TIME_SEPARATOR "T"
+#define D_HOUR_MINUTE_SEPARATOR ":"
+#define D_MINUTE_SECOND_SEPARATOR ":"
+
+#define D_DAY3LIST "SönMånTisOnsTorFreLör"
+#define D_MONTH3LIST "JanFebMarAprMajJunJulAugSepOktNovDec"
+
+// Non JSON decimal separator
+#define D_DECIMAL_SEPARATOR ","
+
+// Common
+#define D_ADMIN "Admin"
+#define D_AIR_QUALITY "Luftkvalitet"
+#define D_AP "AP"                    // Access Point
+#define D_AS "som"
+#define D_AUTO "AUTO"
+#define D_BLINK "Blinka"
+#define D_BLINKOFF "BlinkaAv"
+#define D_BOOT_COUNT "Uppstartsräknare"
+#define D_BRIGHTLIGHT "Ljust"
+#define D_BSSID "BSSId"
+#define D_BUTTON "Knapp"
+#define D_BY "av"                    // Written by me
+#define D_BYTES "Bytes"
+#define D_CELSIUS "Celsius"
+#define D_CHANNEL "Kanal"
+#define D_CO2 "Koldioxid"
+#define D_CODE "kod"                // Button code
+#define D_COLDLIGHT "Kallt"
+#define D_COMMAND "Kommando"
+#define D_CONNECTED "Ansluten"
+#define D_COUNT "Räkna"
+#define D_COUNTER "Räknare"
+#define D_CURRENT "Ström"          // As in Voltage and Current
+#define D_DATA "Data"
+#define D_DARKLIGHT "Mörkt"
+#define D_DEBUG "Debug"
+#define D_DISABLED "Inaktiverad"
+#define D_DISTANCE "Distans"
+#define D_DNS_SERVER "DNS-server"
+#define D_DONE "Gjort"
+#define D_DST_TIME "DST"
+#define D_ECO2 "eCO2"
+#define D_EMULATION "Emulation"
+#define D_ENABLED "Aktiverad"
+#define D_ERASE "Ta bort"
+#define D_ERROR "Fel"
+#define D_FAHRENHEIT "Fahrenheit"
+#define D_FAILED "Misslyckades"
+#define D_FALLBACK "Reserv"
+#define D_FALLBACK_TOPIC "Reservämne"
+#define D_FALSE "Falskt"
+#define D_FILE "Fil"
+#define D_FREE_MEMORY "Ledigt minne"
+#define D_FREQUENCY "Frekvens"
+#define D_GAS "Gas"
+#define D_GATEWAY "Gateway"
+#define D_GROUP "Grupp"
+#define D_HOST "Värd"
+#define D_HOSTNAME "Värdnamn"
+#define D_HUMIDITY "Fuktighet"
+#define D_ILLUMINANCE "Belysnings"
+#define D_IMMEDIATE "Omedelbar"      // Button immediate
+#define D_INDEX "Index"
+#define D_INFO "Info"
+#define D_INFRARED "Infraröd"
+#define D_INITIALIZED "Initialiserad"
+#define D_IP_ADDRESS "IP-adress"
+#define D_LIGHT "Ljus"
+#define D_LWT "LWT"
+#define D_MODULE "Modul"
+#define D_MQTT "MQTT"
+#define D_MULTI_PRESS "fler tryck"
+#define D_NOISE "Oväsen"
+#define D_NONE "Ingen"
+#define D_OFF "Av"
+#define D_OFFLINE "Off-line"
+#define D_OK "Ok"
+#define D_ON "På"
+#define D_ONLINE "Ansluten"
+#define D_PASSWORD "Lösenord"
+#define D_PORT "Port"
+#define D_POWER_FACTOR "Spänningsfaktor"
+#define D_POWERUSAGE "Spänning"
+#define D_POWERUSAGE_ACTIVE "Aktiv spänning"
+#define D_POWERUSAGE_APPARENT "Skenbar spänning"
+#define D_POWERUSAGE_REACTIVE "Responsiv spänning"
+#define D_PRESSURE "Tryck"
+#define D_PRESSUREATSEALEVEL "Havstryck"
+#define D_PROGRAM_FLASH_SIZE "Program-flashstorlek"
+#define D_PROGRAM_SIZE "Programstorlek"
+#define D_PROJECT "Projekt"
+#define D_RECEIVED "Mottagen"
+#define D_RESTART "Omstart"
+#define D_RESTARTING "Startar om"
+#define D_RESTART_REASON "Restart Reason"
+#define D_RESTORE "återställ"
+#define D_RETAINED "bevarad"
+#define D_RULE "Regel"
+#define D_SAVE "Spara"
+#define D_SENSOR "Sensor"
+#define D_SSID "SSId"
+#define D_START "Starta"
+#define D_STD_TIME "STD"
+#define D_STOP "Stoppa"
+#define D_SUBNET_MASK "Nätmask"
+#define D_SUBSCRIBE_TO "Prenumera på"
+#define D_SUCCESSFUL "Lyckat"
+#define D_SUNRISE "Soluppgång"
+#define D_SUNSET "Solnedgång"
+#define D_TEMPERATURE "Temperatur"
+#define D_TO "till"
+#define D_TOGGLE "Växla"
+#define D_TOPIC "Ämne"
+#define D_TRANSMIT "Sänd"
+#define D_TRUE "Sant"
+#define D_TVOC "TVOC"
+#define D_UPGRADE "uppgradera"
+#define D_UPLOAD "Ladda upp"
+#define D_UPTIME "Upptid"
+#define D_USER "Användare"
+#define D_UTC_TIME "UTC"
+#define D_UV_INDEX "UV Index"
+#define D_UV_INDEX_1 "Låg"
+#define D_UV_INDEX_2 "Med"
+#define D_UV_INDEX_3 "Hög"
+#define D_UV_INDEX_4 "Farligt"
+#define D_UV_INDEX_5 "BurnL1/2"
+#define D_UV_INDEX_6 "BurnL3"
+#define D_UV_INDEX_7 "OoR"         // Out of Range
+#define D_UV_LEVEL "UV nivå"
+#define D_UV_POWER "UV kraft"
+#define D_VERSION "Version"
+#define D_VOLTAGE "Voltage"
+#define D_WEIGHT "Vikt"
+#define D_WARMLIGHT "Varm"
+#define D_WEB_SERVER "Webbserver"
+
+// sonoff.ino
+#define D_WARNING_MINIMAL_VERSION "VARNING Denna version supporterar inte beständiga inställningar"
+#define D_LEVEL_10 "nivå 1-0"
+#define D_LEVEL_01 "nivå 0-1"
+#define D_SERIAL_LOGGING_DISABLED "Seriell loggning inaktiverad"
+#define D_SYSLOG_LOGGING_REENABLED "Syslog återaktiverad"
+
+#define D_SET_BAUDRATE_TO "Ange Baudrate till"
+#define D_RECEIVED_TOPIC "Mottaget ämne"
+#define D_DATA_SIZE "Datastorlek"
+#define D_ANALOG_INPUT "Analog"
+
+// support.ino
+#define D_OSWATCH "osWatch"
+#define D_BLOCKED_LOOP "Blockerad loop"
+#define D_WPS_FAILED_WITH_STATUS "WPS-konfigurering MISSLYCKADES med status"
+#define D_ACTIVE_FOR_3_MINUTES "aktiv för 3 minuter"
+#define D_FAILED_TO_START "misslyckades att starta"
+#define D_PATCH_ISSUE_2186 "Patch issue 2186"
+#define D_CONNECTING_TO_AP "Ansluter till AP"
+#define D_IN_MODE "i läge"
+#define D_CONNECT_FAILED_NO_IP_ADDRESS "Anslutning misslyckades mottog ingen IP-adress"
+#define D_CONNECT_FAILED_AP_NOT_REACHED "Anslutning misslyckades, kunde inte nå AP"
+#define D_CONNECT_FAILED_WRONG_PASSWORD "Anslutning misslyckades, fel lösenord för AP"
+#define D_CONNECT_FAILED_AP_TIMEOUT "Anslutning misslyckadess med AP, timeout"
+#define D_ATTEMPTING_CONNECTION "Försöker ansluta..."
+#define D_CHECKING_CONNECTION "Kontrollerar anslutning..."
+#define D_QUERY_DONE "Fråga utförd. MQTT-tjänster hittades"
+#define D_MQTT_SERVICE_FOUND "MQTT-tjänst hittades på"
+#define D_FOUND_AT "hittades vid"
+#define D_SYSLOG_HOST_NOT_FOUND "Syslog-värd hittades inte"
+
+// settings.ino
+#define D_SAVED_TO_FLASH_AT "Sparade till flash vid"
+#define D_LOADED_FROM_FLASH_AT "Laddade från flash vid"
+#define D_USE_DEFAULTS "Använd standard"
+#define D_ERASED_SECTOR "Rensade sektor"
+
+// xdrv_02_webserver.ino
+#define D_NOSCRIPT "För att använda Tasmota, aktivera JavaScript"
+#define D_MINIMAL_FIRMWARE_PLEASE_UPGRADE "MINIMAL firmware - var god uppgradera"
+#define D_WEBSERVER_ACTIVE_ON "Webbserver aktiv på"
+#define D_WITH_IP_ADDRESS "med IP-adress"
+#define D_WEBSERVER_STOPPED "Webbserver stoppad"
+#define D_FILE_NOT_FOUND "Filen hittades inte"
+#define D_REDIRECTED "Omdirigerad till fångstportal"
+#define D_WIFIMANAGER_SET_ACCESSPOINT_AND_STATION "Wifihanterare ange accesspunkt och behåll station"
+#define D_WIFIMANAGER_SET_ACCESSPOINT "Wifihanterare ange accesspunkt"
+#define D_TRYING_TO_CONNECT "Försöker att ansluta enheten till nätverk"
+
+#define D_RESTART_IN "Omstart om"
+#define D_SECONDS "sekunder"
+#define D_DEVICE_WILL_RESTART "Enheten kommer att starta om inom ett antal sekunder"
+#define D_BUTTON_TOGGLE "Växla"
+#define D_CONFIGURATION "Konfigurering"
+#define D_INFORMATION "Information"
+#define D_FIRMWARE_UPGRADE "Uppgradera firmware"
+#define D_CONSOLE "Konsol"
+#define D_CONFIRM_RESTART "Bekräfta omstart"
+
+#define D_CONFIGURE_MODULE "Konfigurera modul"
+#define D_CONFIGURE_WIFI "Konfigurera WiFi"
+#define D_CONFIGURE_MQTT "Konfigurera MQTT"
+#define D_CONFIGURE_DOMOTICZ "Konfigurera Domoticz"
+#define D_CONFIGURE_LOGGING "Konfigurera loggning"
+#define D_CONFIGURE_OTHER "Konfigurera annat"
+#define D_CONFIRM_RESET_CONFIGURATION "Bekräfta nollställning av konfiguration"
+#define D_RESET_CONFIGURATION "Nollställ konfiguration"
+#define D_BACKUP_CONFIGURATION "Säkerhetskopiera konfiguration"
+#define D_RESTORE_CONFIGURATION "Återställ konfiguration"
+#define D_MAIN_MENU "Huvudmeny"
+
+#define D_MODULE_PARAMETERS "Modulparameterar"
+#define D_MODULE_TYPE "Modultyp"
+#define D_GPIO "GPIO"
+#define D_SERIAL_IN "Seriell in"
+#define D_SERIAL_OUT "Seriell ut"
+
+#define D_WIFI_PARAMETERS "Wifi-parameterar"
+#define D_SCAN_FOR_WIFI_NETWORKS "Skanna efter wifi-nätverk"
+#define D_SCAN_DONE "Skanning slutförd"
+#define D_NO_NETWORKS_FOUND "Inga nätverk hittades"
+#define D_REFRESH_TO_SCAN_AGAIN "Uppdatera för att skanna igen"
+#define D_DUPLICATE_ACCESSPOINT "Dubblett accesspunkt"
+#define D_SKIPPING_LOW_QUALITY "Hoppa över pga dålig kvalitet"
+#define D_RSSI "RSSI"
+#define D_WEP "WEP"
+#define D_WPA_PSK "WPA PSK"
+#define D_WPA2_PSK "WPA2 PSK"
+#define D_AP1_SSID "AP1 SSId"
+#define D_AP1_PASSWORD "AP1 lösenord"
+#define D_AP2_SSID "AP2 SSId"
+#define D_AP2_PASSWORD "AP2 lösenord"
+
+#define D_MQTT_PARAMETERS "MQTT-parameterar"
+#define D_CLIENT "Klient"
+#define D_FULL_TOPIC "Fullt ämne"
+
+#define D_LOGGING_PARAMETERS "Loggningsparametrar"
+#define D_SERIAL_LOG_LEVEL "Seriell loggnivå"
+#define D_WEB_LOG_LEVEL "Webb loggnivå"
+#define D_SYS_LOG_LEVEL "Syslog-nivp"
+#define D_MORE_DEBUG "Mer debugging"
+#define D_SYSLOG_HOST "Syslog-värd"
+#define D_SYSLOG_PORT "Syslog-port"
+#define D_TELEMETRY_PERIOD "Telemetriperiod"
+
+#define D_OTHER_PARAMETERS "Andra parametrar"
+#define D_WEB_ADMIN_PASSWORD "Webbadmin-lösenord"
+#define D_MQTT_ENABLE "MQTT aktivera"
+#define D_FRIENDLY_NAME "Läsbart namn"
+#define D_BELKIN_WEMO "Belkin WeMo"
+#define D_HUE_BRIDGE "Hue Bridge"
+#define D_SINGLE_DEVICE "soloenhet"
+#define D_MULTI_DEVICE "multienhet"
+
+#define D_SAVE_CONFIGURATION "Spara konfiguration"
+#define D_CONFIGURATION_SAVED "Konfiguration sparad"
+#define D_CONFIGURATION_RESET "Konfiguration nollställd"
+
+#define D_PROGRAM_VERSION "Programversion"
+#define D_BUILD_DATE_AND_TIME "Build datum & tid"
+#define D_CORE_AND_SDK_VERSION "Core/SDK Version"
+#define D_FLASH_WRITE_COUNT "Flash-skrivningsräknare"
+#define D_MAC_ADDRESS "MAC-adress"
+#define D_MQTT_HOST "MQTT-värd"
+#define D_MQTT_PORT "MQTT-port"
+#define D_MQTT_CLIENT "MQTT-klient"
+#define D_MQTT_USER "MQTT-användare"
+#define D_MQTT_TOPIC "MQTT-ämne"
+#define D_MQTT_GROUP_TOPIC "MQTT gruppämne"
+#define D_MQTT_FULL_TOPIC "MQTT fullt ämne"
+#define D_MDNS_DISCOVERY "mDNS upptäckning"
+#define D_MDNS_ADVERTISE "mDNS annonsering"
+#define D_ESP_CHIP_ID "ESP Chip Id"
+#define D_FLASH_CHIP_ID "Flash Chip Id"
+#define D_FLASH_CHIP_SIZE "Flash-storlek"
+#define D_FREE_PROGRAM_SPACE "Ledigt programutrymme"
+
+#define D_UPGRADE_BY_WEBSERVER "Uppgradering via webbserver"
+#define D_OTA_URL "OTA Url"
+#define D_START_UPGRADE "Starta uppdatering"
+#define D_UPGRADE_BY_FILE_UPLOAD "Uppgradering via filuppladdning"
+#define D_UPLOAD_STARTED "Uppladdning startad"
+#define D_UPGRADE_STARTED "Uppgradeing startad"
+#define D_UPLOAD_DONE "Uppladdning klar"
+#define D_UPLOAD_ERR_1 "Ingen fil vald"
+#define D_UPLOAD_ERR_2 "Inte tillräckligt med ledigt utrymme"
+#define D_UPLOAD_ERR_3 "Magisk byte är inte 0xE9"
+#define D_UPLOAD_ERR_4 "Programmets flashstorlek är större än den verkliga flashstorleken"
+#define D_UPLOAD_ERR_5 "Uppladdningbuffert stämmer inte överens"
+#define D_UPLOAD_ERR_6 "Uppladdning misslyckad. Aktivera loggning 3"
+#define D_UPLOAD_ERR_7 "Uppladdning avbruten"
+#define D_UPLOAD_ERR_8 "Ogiltig fil"
+#define D_UPLOAD_ERR_9 "För stor fil"
+#define D_UPLOAD_ERR_10 "Misslyckades initera RF chip"
+#define D_UPLOAD_ERR_11 "Misslyckades rensa RF chip"
+#define D_UPLOAD_ERR_12 "Misslyckades skriva till RF chip"
+#define D_UPLOAD_ERR_13 "Misslyckades avkoda RF firmware"
+#define D_UPLOAD_ERROR_CODE "Upladdningsfelkod"
+
+#define D_ENTER_COMMAND "Ange kommando"
+#define D_ENABLE_WEBLOG_FOR_RESPONSE "Aktivera weblog 2 om svar förväntas"
+#define D_NEED_USER_AND_PASSWORD "Behöver användarnamn=<användarnamn>&lösenord=<lösenord>"
+
+// xdrv_01_mqtt.ino
+#define D_FINGERPRINT "Verifierar TLS fingeravtryck..."
+#define D_TLS_CONNECT_FAILED_TO "TLS-anslutning misslyckades"
+#define D_RETRY_IN "Försöker igen om"
+#define D_VERIFIED "Verifierad med fingeravtryck"
+#define D_INSECURE "Osäker anslutning pga ogiltigt fingeravtryck"
+#define D_CONNECT_FAILED_TO "Anslutning misslyckades"
+
+// xplg_wemohue.ino
+#define D_MULTICAST_DISABLED "Multicast inaktiverad"
+#define D_MULTICAST_REJOINED "Multicast (åter)anslöt"
+#define D_MULTICAST_JOIN_FAILED "Multicast anslutning misslyckades"
+#define D_FAILED_TO_SEND_RESPONSE "Misslyckades skicka svar"
+
+#define D_WEMO "WeMo"
+#define D_WEMO_BASIC_EVENT "WeMo standardhändelse"
+#define D_WEMO_EVENT_SERVICE "WeMo händelsetjänst"
+#define D_WEMO_META_SERVICE "WeMo metatjänst"
+#define D_WEMO_SETUP "WeMo installation"
+#define D_RESPONSE_SENT "Svar skickat"
+
+#define D_HUE "Hue"
+#define D_HUE_BRIDGE_SETUP "Hue installation"
+#define D_HUE_API_NOT_IMPLEMENTED "Hue API inte implementerat"
+#define D_HUE_API "Hue API"
+#define D_HUE_POST_ARGS "Hue POST args"
+#define D_3_RESPONSE_PACKETS_SENT "3 svarspaket skickade"
+
+// xdrv_07_domoticz.ino
+#define D_DOMOTICZ_PARAMETERS "Domoticz parametetrar"
+#define D_DOMOTICZ_IDX "Idx"
+#define D_DOMOTICZ_KEY_IDX "Nyckel idx"
+#define D_DOMOTICZ_SWITCH_IDX "Switch idx"
+#define D_DOMOTICZ_SENSOR_IDX "Sensor idx"
+  #define D_DOMOTICZ_TEMP "Temp"
+  #define D_DOMOTICZ_TEMP_HUM "Temp,Fuk"
+  #define D_DOMOTICZ_TEMP_HUM_BARO "Temp,Fuk,Baro"
+  #define D_DOMOTICZ_POWER_ENERGY "Spänning,Energi"
+  #define D_DOMOTICZ_ILLUMINANCE "Belysningsstyrka"
+  #define D_DOMOTICZ_COUNT "Antal/PM1"
+  #define D_DOMOTICZ_VOLTAGE "Volt/PM2.5"
+  #define D_DOMOTICZ_CURRENT "Ström/PM10"
+  #define D_DOMOTICZ_AIRQUALITY "Luftkvalitet"
+#define D_DOMOTICZ_UPDATE_TIMER "Uppdatera timer"
+
+// xdrv_09_timers.ino
+#define D_CONFIGURE_TIMER "Konfigurera timer"
+#define D_TIMER_PARAMETERS "timerparametrar"
+#define D_TIMER_ENABLE "Aktivera timer"
+#define D_TIMER_ARM "Aktivera"
+#define D_TIMER_TIME "Tid"
+#define D_TIMER_DAYS "Dagar"
+#define D_TIMER_REPEAT "Repetera"
+#define D_TIMER_OUTPUT "Output"
+#define D_TIMER_ACTION "Action"
+
+// xdrv_10_knx.ino
+#define D_CONFIGURE_KNX "Konfigurera KNX"
+#define D_KNX_PARAMETERS "KNX Parametrar"
+#define D_KNX_GENERAL_CONFIG "Allmänt"
+#define D_KNX_PHYSICAL_ADDRESS "Fysisk adress"
+#define D_KNX_PHYSICAL_ADDRESS_NOTE "( Måste vara unik på KNX-nätverket )"
+#define D_KNX_ENABLE "Aktivera KNX"
+#define D_KNX_GROUP_ADDRESS_TO_WRITE "Data att skicka till gruppadresser"
+#define D_ADD "Lägg till"
+#define D_DELETE "Ta bort"
+#define D_REPLY "Svara"
+#define D_KNX_GROUP_ADDRESS_TO_READ "Gruppadresser att ta emot data från"
+#define D_LOG_KNX "KNX: "
+#define D_RECEIVED_FROM "Mottagen från"
+#define D_KNX_COMMAND_WRITE "Skriv"
+#define D_KNX_COMMAND_READ "Läs"
+#define D_KNX_COMMAND_OTHER "Andra"
+#define D_SENT_TO "skickad till"
+#define D_KNX_WARNING "Gruppadressen ( 0 / 0 / 0 ) är reserverad och kan inte användas."
+#define D_KNX_ENHANCEMENT "Kommuniceringsförbättring"
+#define D_KNX_TX_SLOT "KNX TX"
+#define D_KNX_RX_SLOT "KNX RX"
+
+// xdrv_03_energy.ino
+#define D_ENERGY_TODAY "Energi idag"
+#define D_ENERGY_YESTERDAY "Energi igår"
+#define D_ENERGY_TOTAL "Energi totalt"
+
+// xsns_05_ds18b20.ino
+#define D_SENSOR_BUSY "Sensor upptagen"
+#define D_SENSOR_CRC_ERROR "Sensor CRC-fel"
+#define D_SENSORS_FOUND "Sensorer hittades"
+
+// xsns_06_dht.ino
+#define D_TIMEOUT_WAITING_FOR "Timeout under väntan"
+#define D_START_SIGNAL_LOW "startsignal låg"
+#define D_START_SIGNAL_HIGH "startsignal hög"
+#define D_PULSE "puls"
+#define D_CHECKSUM_FAILURE "Fel kontrollsumma"
+
+// xsns_07_sht1x.ino
+#define D_SENSOR_DID_NOT_ACK_COMMAND "Sensor besvarade inte med ACK kommando"
+#define D_SHT1X_FOUND "SHT1X hittades"
+
+// xsns_18_pms5003.ino
+#define D_STANDARD_CONCENTRATION "CF-1 PM"     // Standard Particle CF-1 Particle Matter
+#define D_ENVIRONMENTAL_CONCENTRATION "PM"     // Environmetal Particle Matter
+#define D_PARTICALS_BEYOND "Partiklar"
+
+// xsns_32_mpu6050.ino
+#define D_AX_AXIS "Accel. X-Axel"
+#define D_AY_AXIS "Accel. Y-Axel"
+#define D_AZ_AXIS "Accel. Z-Axel"
+#define D_GX_AXIS "Gyro X-Axel"
+#define D_GY_AXIS "Gyro Y-Axel"
+#define D_GZ_AXIS "Gyro Z-Axel"
+
+// xsns_34_hx711.ino
+#define D_HX_CAL_REMOVE "Ta bort vikter"
+#define D_HX_CAL_REFERENCE "Ladda referensvikt"
+#define D_HX_CAL_DONE "Kalibrerad"
+#define D_HX_CAL_FAIL "Kalibrering misslyckad"
+#define D_RESET_HX711 "Återställ våg"
+#define D_CONFIGURE_HX711 "Konfigurera våg"
+#define D_HX711_PARAMETERS "Vågparametrar"
+#define D_ITEM_WEIGHT "Objektsvikt"
+#define D_REFERENCE_WEIGHT "Referensvikt"
+#define D_CALIBRATE "Kalibrera"
+#define D_CALIBRATION "Kalibrering"
+
+//xsns_35_tx20.ino
+#define D_TX20_WIND_DIRECTION "Vindriktning"
+#define D_TX20_WIND_SPEED "Vindstyrka"
+#define D_TX20_WIND_SPEED_AVG "Vindstyrka medel"
+#define D_TX20_WIND_SPEED_MAX "Vindstyrka max"
+#define D_TX20_NORTH "N"
+#define D_TX20_EAST "E"
+#define D_TX20_SOUTH "S"
+#define D_TX20_WEST "W"
+
+// sonoff_template.h
+#define D_SENSOR_NONE     "Ingen"
+#define D_SENSOR_DHT11    "DHT11"
+#define D_SENSOR_AM2301   "AM2301"
+#define D_SENSOR_SI7021   "SI7021"
+#define D_SENSOR_DS18X20  "DS18x20"
+#define D_SENSOR_I2C_SCL  "I2C SCL"
+#define D_SENSOR_I2C_SDA  "I2C SDA"
+#define D_SENSOR_WS2812   "WS2812"
+#define D_SENSOR_DFR562   "MP3-spelare"
+#define D_SENSOR_IRSEND   "IRsend"
+#define D_SENSOR_SWITCH   "Omkopplare"   // Suffix "1"
+#define D_SENSOR_BUTTON   "Knapp"   // Suffix "1"
+#define D_SENSOR_RELAY    "Relä"    // Suffix "1i"
+#define D_SENSOR_LED      "Led"      // Suffix "1i"
+#define D_SENSOR_PWM      "PWM"      // Suffix "1"
+#define D_SENSOR_COUNTER  "Räknare"  // Suffix "1"
+#define D_SENSOR_IRRECV   "IRrecv"
+#define D_SENSOR_MHZ_RX   "MHZ Rx"
+#define D_SENSOR_MHZ_TX   "MHZ Tx"
+#define D_SENSOR_PZEM004_RX  "PZEM004 Rx"
+#define D_SENSOR_PZEM016_RX  "PZEM016 Rx"
+#define D_SENSOR_PZEM017_RX  "PZEM017 Rx"
+#define D_SENSOR_PZEM0XX_TX  "PZEM0XX Tx"
+#define D_SENSOR_SAIR_RX  "SAir Rx"
+#define D_SENSOR_SAIR_TX  "SAir Tx"
+#define D_SENSOR_SPI_CS   "SPI CS"
+#define D_SENSOR_SPI_DC   "SPI DC"
+#define D_SENSOR_BACKLIGHT "BkLight"
+#define D_SENSOR_PMS5003  "PMS5003"
+#define D_SENSOR_SDS0X1_RX "SDS0X1 Rx"
+#define D_SENSOR_SDS0X1_TX "SDS0X1 Tx"
+#define D_SENSOR_SBR_RX   "SerBr Rx"
+#define D_SENSOR_SBR_TX   "SerBr Tx"
+#define D_SENSOR_SR04_TRIG "SR04 Tri"
+#define D_SENSOR_SR04_ECHO "SR04 Ech"
+#define D_SENSOR_SDM120_TX "SDM120 Tx"
+#define D_SENSOR_SDM120_RX "SDM120 Rx"
+#define D_SENSOR_SDM630_TX "SDM630 Tx"
+#define D_SENSOR_SDM630_RX "SDM630 Rx"
+#define D_SENSOR_TM1638_CLK "TM16 CLK"
+#define D_SENSOR_TM1638_DIO "TM16 DIO"
+#define D_SENSOR_TM1638_STB "TM16 STB"
+#define D_SENSOR_HX711_SCK "HX711 SCK"
+#define D_SENSOR_HX711_DAT "HX711 DAT"
+#define D_SENSOR_TX20_TX "TX20"
+#define D_SENSOR_RFSEND "RFSend"
+#define D_SENSOR_RFRECV "RFrecv"
+#define D_SENSOR_TUYA_TX "Tuya Tx"
+#define D_SENSOR_TUYA_RX "Tuya Rx"
+#define D_SENSOR_MGC3130_XFER "MGC3130 Xfer"
+#define D_SENSOR_MGC3130_RESET "MGC3130 Reset"
+#define D_SENSOR_SSPI_MISO "SSPI MISO"
+#define D_SENSOR_SSPI_MOSI "SSPI MOSI"
+#define D_SENSOR_SSPI_SCLK "SSPI SCLK"
+#define D_SENSOR_SSPI_CS   "SSPI CS"
+#define D_SENSOR_SSPI_DC   "SSPI DC"
+
+
+// Units
+#define D_UNIT_AMPERE "A"
+#define D_UNIT_CENTIMETER "cm"
+#define D_UNIT_HERTZ "Hz"
+#define D_UNIT_HOUR "Hr"
+#define D_UNIT_INCREMENTS "inc"
+#define D_UNIT_KILOGRAM "kg"
+#define D_UNIT_KILOMETER_PER_HOUR "km/h"  // or "km/h"
+#define D_UNIT_KILOOHM "kOhm"
+#define D_UNIT_KILOWATTHOUR "kWh"
+#define D_UNIT_LUX "lx"
+#define D_UNIT_MICROGRAM_PER_CUBIC_METER "ug/m3"
+#define D_UNIT_MICROMETER "um"
+#define D_UNIT_MICROSECOND "us"
+#define D_UNIT_MILLIAMPERE "mA"
+#define D_UNIT_MILLIMETER_MERCURY "mmHg"
+#define D_UNIT_MILLISECOND "ms"
+#define D_UNIT_MINUTE "Min"
+#define D_UNIT_PARTS_PER_BILLION "ppb"
+#define D_UNIT_PARTS_PER_DECILITER "ppd"
+#define D_UNIT_PARTS_PER_MILLION "ppm"
+#define D_UNIT_PRESSURE "hPa"
+#define D_UNIT_SECOND "sek"
+#define D_UNIT_SECTORS "sektorer"
+#define D_UNIT_VA "VA"
+#define D_UNIT_VAR "VAr"
+#define D_UNIT_VOLT "V"
+#define D_UNIT_WATT "W"
+#define D_UNIT_WATTHOUR "Wh"
+#define D_UNIT_WATT_METER_QUADRAT "W/m²"
+
+// Log message prefix
+#define D_LOG_APPLICATION "APP: "  // Application
+#define D_LOG_BRIDGE "BRG: "       // Bridge
+#define D_LOG_CONFIG "CFG: "       // Settings
+#define D_LOG_COMMAND "CMD: "      // Command
+#define D_LOG_DEBUG "DBG: "        // Debug
+#define D_LOG_DHT "DHT: "          // DHT sensor
+#define D_LOG_DOMOTICZ "DOM: "     // Domoticz
+#define D_LOG_DSB "DSB: "          // DS18xB20 sensor
+#define D_LOG_HTTP "HTP: "         // HTTP webserver
+#define D_LOG_I2C "I2C: "          // I2C
+#define D_LOG_IRR "IRR: "          // Infra Red Received
+#define D_LOG_LOG "LOG: "          // Logging
+#define D_LOG_MODULE "MOD: "       // Module
+#define D_LOG_MDNS "DNS: "         // mDNS
+#define D_LOG_MQTT "MQT: "         // MQTT
+#define D_LOG_OTHER "OTH: "        // Other
+#define D_LOG_RESULT "RSL: "       // Result
+#define D_LOG_RFR "RFR: "          // RF Received
+#define D_LOG_SERIAL "SER: "       // Serial
+#define D_LOG_SHT1 "SHT: "         // SHT1x sensor
+#define D_LOG_UPLOAD "UPL: "       // Upload
+#define D_LOG_UPNP "UPP: "         // UPnP
+#define D_LOG_WIFI "WIF: "         // Wifi
+
+#endif  // _LANGUAGE_SV_SE_H_
diff --git a/sonoff/my_user_config.h b/sonoff/my_user_config.h
index 6d615b0a7..ef81066f3 100644
--- a/sonoff/my_user_config.h
+++ b/sonoff/my_user_config.h
@@ -208,6 +208,7 @@
 //#define MY_LANGUAGE            pt-BR           // Portuguese in Brazil
 //#define MY_LANGUAGE            pt-PT           // Portuguese in Portugal
 //#define MY_LANGUAGE            ru-RU           // Russian in Russia
+//#define MY_LANGUAGE            sv-SE           // Swedish in Sweden
 //#define MY_LANGUAGE            tr-TR           // Turkish in Turkey
 //#define MY_LANGUAGE            uk-UK           // Ukrainian in Ukrain
 //#define MY_LANGUAGE            zh-CN           // Chinese (Simplified) in China