diff --git a/elements/10_electric/10_allpole/395_electronics&semiconductors/11_diodes/qet_directory b/elements/10_electric/10_allpole/395_electronics&semiconductors/11_diodes/qet_directory
index c017a32c5..e9cb461e3 100644
--- a/elements/10_electric/10_allpole/395_electronics&semiconductors/11_diodes/qet_directory
+++ b/elements/10_electric/10_allpole/395_electronics&semiconductors/11_diodes/qet_directory
@@ -5,7 +5,7 @@
         <name lang="it">Diodo</name>
         <name lang="fr">Diode</name>
         <name lang="pl">Diody</name>
-        <name lang="cs">Dioda</name>
+        <name lang="cs">Diody</name>
         <name lang="nl">Diodes</name>
         <name lang="el">Δίοδοι</name>
         <name lang="ru">Диоды</name>
diff --git a/elements/10_electric/10_allpole/395_electronics&semiconductors/12_transistors/qet_directory b/elements/10_electric/10_allpole/395_electronics&semiconductors/12_transistors/qet_directory
index e8a65859d..df87f168a 100644
--- a/elements/10_electric/10_allpole/395_electronics&semiconductors/12_transistors/qet_directory
+++ b/elements/10_electric/10_allpole/395_electronics&semiconductors/12_transistors/qet_directory
@@ -7,7 +7,7 @@
         <name lang="it">Transistor</name>
         <name lang="fr">Transistors</name>
         <name lang="pl">Tranzystory</name>
-        <name lang="cs">Tranzistor</name>
+        <name lang="cs">Tranzistory</name>
         <name lang="nl">Transistor</name>
         <name lang="ru">Транзисторы</name>
     </names>
diff --git a/elements/10_electric/10_allpole/395_electronics&semiconductors/13_thyristors/qet_directory b/elements/10_electric/10_allpole/395_electronics&semiconductors/13_thyristors/qet_directory
index 530d5975d..c9b6982a7 100644
--- a/elements/10_electric/10_allpole/395_electronics&semiconductors/13_thyristors/qet_directory
+++ b/elements/10_electric/10_allpole/395_electronics&semiconductors/13_thyristors/qet_directory
@@ -10,7 +10,7 @@
         <name lang="fr">Thyristors</name>
         <name lang="pl">Tyrystory</name>
         <name lang="es">Tiristor</name>
-        <name lang="cs">Thyristor</name>
+        <name lang="cs">Thyristory</name>
         <name lang="nl">Thyristors</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/395_electronics&semiconductors/24piezo/qet_directory b/elements/10_electric/10_allpole/395_electronics&semiconductors/24piezo/qet_directory
index 72df1f0a2..19c31e304 100644
--- a/elements/10_electric/10_allpole/395_electronics&semiconductors/24piezo/qet_directory
+++ b/elements/10_electric/10_allpole/395_electronics&semiconductors/24piezo/qet_directory
@@ -3,5 +3,6 @@
         <name lang="en">Piezo</name>
         <name lang="pl">Przetworniki piezoceramiczne</name>
         <name lang="fr">Piezo</name>
+        <name lang="cs">Piezo</name>
    </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/395_electronics&semiconductors/qet_directory b/elements/10_electric/10_allpole/395_electronics&semiconductors/qet_directory
index 982ef7092..8fdf6b2fa 100644
--- a/elements/10_electric/10_allpole/395_electronics&semiconductors/qet_directory
+++ b/elements/10_electric/10_allpole/395_electronics&semiconductors/qet_directory
@@ -9,5 +9,6 @@
         <name lang="de">Elektronik und Halbleiter</name>
         <name lang="nl">Electronica en halfgeleiders</name>
         <name lang="el">Ηλεκτρονικά και ημιαγωγοί</name>
+        <name lang="cs">Elektronika a polovodiče</name>
     </names>
 </qet-directory>
diff --git a/elements/50_pneumatic/91_vacuum/ejecteur.elmt b/elements/50_pneumatic/91_vacuum/ejecteur.elmt
index e81f2f3c4..35b2de68c 100644
--- a/elements/50_pneumatic/91_vacuum/ejecteur.elmt
+++ b/elements/50_pneumatic/91_vacuum/ejecteur.elmt
@@ -3,7 +3,7 @@
         <name lang="en">Vacuum generators</name>
         <name lang="fr">Générateurs de vide</name>
         <name lang="pl">Generator podciśnienia</name>
-        <name lang="cs">Tvůrci vzduchoprázdna</name>
+        <name lang="cs">Vyvíječe vzduchoprázdna (vakua)</name>
         <name lang="ar">مُولّد فراغ</name>
         <name lang="it">Generatore di vuoto</name>
         <name lang="nl">Vacuum maker</name>