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}