diff --git a/apps/math_toolbox.cpp b/apps/math_toolbox.cpp
index 960466bbe..3ac4dc78c 100644
--- a/apps/math_toolbox.cpp
+++ b/apps/math_toolbox.cpp
@@ -209,15 +209,9 @@ const ToolboxMessageTree unitResistanceOhmChildren[] = {
 };
 
 const ToolboxMessageTree unitConductanceSiemensChildren[] = {
-  ToolboxMessageTree::Leaf(I18n::Message::UnitConductanceSiemensTeraSymbol, I18n::Message::UnitConductanceSiemensTera),
-  ToolboxMessageTree::Leaf(I18n::Message::UnitConductanceSiemensGigaSymbol, I18n::Message::UnitConductanceSiemensGiga),
-  ToolboxMessageTree::Leaf(I18n::Message::UnitConductanceSiemensMegaSymbol, I18n::Message::UnitConductanceSiemensMega),
-  ToolboxMessageTree::Leaf(I18n::Message::UnitConductanceSiemensKiloSymbol, I18n::Message::UnitConductanceSiemensKilo),
   ToolboxMessageTree::Leaf(I18n::Message::UnitConductanceSiemensSymbol, I18n::Message::UnitConductanceSiemens),
   ToolboxMessageTree::Leaf(I18n::Message::UnitConductanceSiemensMilliSymbol, I18n::Message::UnitConductanceSiemensMilli),
-  ToolboxMessageTree::Leaf(I18n::Message::UnitConductanceSiemensMicroSymbol, I18n::Message::UnitConductanceSiemensMicro),
-  ToolboxMessageTree::Leaf(I18n::Message::UnitConductanceSiemensNanoSymbol, I18n::Message::UnitConductanceSiemensNano),
-  ToolboxMessageTree::Leaf(I18n::Message::UnitConductanceSiemensPicoSymbol, I18n::Message::UnitConductanceSiemensPico)};
+};
 
 const ToolboxMessageTree unitMagneticFieldChildren[] = {
   ToolboxMessageTree::Leaf(I18n::Message::UnitMagneticFieldTeslaSymbol, I18n::Message::UnitMagneticFieldTesla)};
diff --git a/apps/shared.universal.i18n b/apps/shared.universal.i18n
index aa7451067..17d0a9eaa 100644
--- a/apps/shared.universal.i18n
+++ b/apps/shared.universal.i18n
@@ -65,15 +65,8 @@ UnitCapacitanceFaradMilliSymbol = "_mF"
 UnitCapacitanceFaradMicroSymbol = "_μF"
 UnitResistanceOhmKiloSymbol = "_kΩ"
 UnitResistanceOhmSymbol = "_Ω"
-UnitConductanceSiemensTeraSymbol = "_TS"
-UnitConductanceSiemensGigaSymbol = "_GS"
-UnitConductanceSiemensMegaSymbol = "_MS"
-UnitConductanceSiemensKiloSymbol = "_KS"
 UnitConductanceSiemensSymbol = "_S"
 UnitConductanceSiemensMilliSymbol = "_mS"
-UnitConductanceSiemensMicroSymbol = "_μS"
-UnitConductanceSiemensNanoSymbol = "_nS"
-UnitConductanceSiemensPicoSymbol = "_pS"
 UnitMagneticFieldTeslaSymbol = "_T"
 UnitInductanceHenrySymbol = "_H"
 UnitSurfaceHectarSymbol = "_ha"
diff --git a/apps/toolbox.de.i18n b/apps/toolbox.de.i18n
index 4eebbfd3f..6dacd56e9 100644
--- a/apps/toolbox.de.i18n
+++ b/apps/toolbox.de.i18n
@@ -87,15 +87,8 @@ UnitResistanceMenu = "Electrical resistance"
 UnitResistanceOhmKilo = "Kiloohm"
 UnitResistanceOhm = "Ohm"
 UnitConductanceMenu = "Electrical conductance"
-UnitConductanceSiemensTera = "Terasiemens"
-UnitConductanceSiemensGiga = "Gigasiemens"
-UnitConductanceSiemensMega = "Megasiemens"
-UnitConductanceSiemensKilo = "Kilosiemens"
 UnitConductanceSiemens = "Siemens"
 UnitConductanceSiemensMilli = "Millisiemens"
-UnitConductanceSiemensMicro = "Microsiemens"
-UnitConductanceSiemensNano = "Nanosiemens"
-UnitConductanceSiemensPico = "Picosiemens"
 UnitMagneticFieldMenu = "Magnetic field"
 UnitMagneticFieldTesla = "Tesla"
 InductanceMenu = "Electrical inductance"
diff --git a/apps/toolbox.en.i18n b/apps/toolbox.en.i18n
index 5bdc11bca..9390b5663 100644
--- a/apps/toolbox.en.i18n
+++ b/apps/toolbox.en.i18n
@@ -87,15 +87,8 @@ UnitResistanceMenu = "Electrical resistance"
 UnitResistanceOhmKilo = "Kiloohm"
 UnitResistanceOhm = "Ohm"
 UnitConductanceMenu = "Electrical conductance"
-UnitConductanceSiemensTera = "Terasiemens"
-UnitConductanceSiemensGiga = "Gigasiemens"
-UnitConductanceSiemensMega = "Megasiemens"
-UnitConductanceSiemensKilo = "Kilosiemens"
 UnitConductanceSiemens = "Siemens"
 UnitConductanceSiemensMilli = "Millisiemens"
-UnitConductanceSiemensMicro = "Microsiemens"
-UnitConductanceSiemensNano = "Nanosiemens"
-UnitConductanceSiemensPico = "Picosiemens"
 UnitMagneticFieldMenu = "Magnetic field"
 UnitMagneticFieldTesla = "Tesla"
 InductanceMenu = "Electrical inductance"
diff --git a/apps/toolbox.es.i18n b/apps/toolbox.es.i18n
index 02dca50f4..666a27cbe 100644
--- a/apps/toolbox.es.i18n
+++ b/apps/toolbox.es.i18n
@@ -87,15 +87,8 @@ UnitResistanceMenu = "Electrical resistance"
 UnitResistanceOhmKilo = "Kiloohm"
 UnitResistanceOhm = "Ohm"
 UnitConductanceMenu = "Electrical conductance"
-UnitConductanceSiemensTera = "Terasiemens"
-UnitConductanceSiemensGiga = "Gigasiemens"
-UnitConductanceSiemensMega = "Megasiemens"
-UnitConductanceSiemensKilo = "Kilosiemens"
 UnitConductanceSiemens = "Siemens"
 UnitConductanceSiemensMilli = "Millisiemens"
-UnitConductanceSiemensMicro = "Microsiemens"
-UnitConductanceSiemensNano = "Nanosiemens"
-UnitConductanceSiemensPico = "Picosiemens"
 UnitMagneticFieldMenu = "Magnetic field"
 UnitMagneticFieldTesla = "Tesla"
 InductanceMenu = "Electrical inductance"
diff --git a/apps/toolbox.fr.i18n b/apps/toolbox.fr.i18n
index 2ca5579fd..6b8ffe17b 100644
--- a/apps/toolbox.fr.i18n
+++ b/apps/toolbox.fr.i18n
@@ -87,15 +87,8 @@ UnitResistanceMenu = "Résistance électrique"
 UnitResistanceOhmKilo = "Kiloohm"
 UnitResistanceOhm = "Ohm"
 UnitConductanceMenu = "Conductance électrique"
-UnitConductanceSiemensTera = "Terasiemens"
-UnitConductanceSiemensGiga = "Gigasiemens"
-UnitConductanceSiemensMega = "Megasiemens"
-UnitConductanceSiemensKilo = "Kilosiemens"
 UnitConductanceSiemens = "Siemens"
 UnitConductanceSiemensMilli = "Millisiemens"
-UnitConductanceSiemensMicro = "Microsiemens"
-UnitConductanceSiemensNano = "Nanosiemens"
-UnitConductanceSiemensPico = "Picosiemens"
 UnitMagneticFieldMenu = "Induction électromagnétique"
 UnitMagneticFieldTesla = "Tesla"
 InductanceMenu = "Inductance"
diff --git a/apps/toolbox.pt.i18n b/apps/toolbox.pt.i18n
index d96fc4890..a9603cdac 100644
--- a/apps/toolbox.pt.i18n
+++ b/apps/toolbox.pt.i18n
@@ -87,15 +87,8 @@ UnitResistanceMenu = "Electrical resistance"
 UnitResistanceOhmKilo = "Kiloohm"
 UnitResistanceOhm = "Ohm"
 UnitConductanceMenu = "Electrical conductance"
-UnitConductanceSiemensTera = "Terasiemens"
-UnitConductanceSiemensGiga = "Gigasiemens"
-UnitConductanceSiemensMega = "Megasiemens"
-UnitConductanceSiemensKilo = "Kilosiemens"
 UnitConductanceSiemens = "Siemens"
 UnitConductanceSiemensMilli = "Millisiemens"
-UnitConductanceSiemensMicro = "Microsiemens"
-UnitConductanceSiemensNano = "Nanosiemens"
-UnitConductanceSiemensPico = "Picosiemens"
 UnitMagneticFieldMenu = "Magnetic field"
 UnitMagneticFieldTesla = "Tesla"
 InductanceMenu = "Electrical inductance"