diff --git a/CMakeModules/markdown2C.cmake b/CMakeModules/markdown2C.cmake
index bb898fe7a4..f1986b8e76 100644
--- a/CMakeModules/markdown2C.cmake
+++ b/CMakeModules/markdown2C.cmake
@@ -7,9 +7,18 @@ file( READ ${inputFile} buffer )
 
 file( WRITE ${outputFile} "// Do not edit this file, it is autogenerated by CMake from an .md file\n" )
 
+# Replace each "\" char by "\\". the \ is found in .md files
+# to prepend some chars that usually control chars
+STRING( REGEX REPLACE "\\\\" "\\\\\\\\" linea ${buffer} )
+
 # Replace each EOL char by "\n" + " + EOL
-STRING(REGEX REPLACE "\"" "\\\\\"" linem ${buffer})
-STRING(REGEX REPLACE "\n" "\\\\n\"\n\"" buff_m ${linem})
+STRING( REGEX REPLACE "\"" "\\\\\"" linem ${linea} )
+
+# create the full string compatible "C":
+# _HKI( "<md string>"\n
+# to make it translatable. We use here the marker _HKI because
+# the translation will be explicitely called in Kicad code
+STRING( REGEX REPLACE "\n" "\\\\n\"\n\"" buff_m ${linem} )
 
 # Write the buffer between quotes
 file( APPEND ${outputFile} "_HKI( \"" ${buff_m} "\" )\n" )
diff --git a/pcb_calculator/attenuators/bridget_tee_formula.md b/pcb_calculator/attenuators/bridget_tee_formula.md
index 1bfda337e0..75adac69be 100644
--- a/pcb_calculator/attenuators/bridget_tee_formula.md
+++ b/pcb_calculator/attenuators/bridget_tee_formula.md
@@ -1,5 +1,5 @@
 ### Bridged tee attenuator:
-__Zin__ desired input impedance in &#8486;<br>
+__Zin__ desired input impedance in &#x2126;<br>
 __Zout__ desired output impedance<br>
 __Z<sub>0</sub> = Zin = Zout__<br><br>
 
diff --git a/pcb_calculator/attenuators/pi_formula.md b/pcb_calculator/attenuators/pi_formula.md
index 63726834a4..28d77cdc84 100644
--- a/pcb_calculator/attenuators/pi_formula.md
+++ b/pcb_calculator/attenuators/pi_formula.md
@@ -1,5 +1,5 @@
 ## Pi attenuator
-__Zin__ desired input impedance in &#8486;<br>
+__Zin__ desired input impedance in &#x2126;<br>
 __Zout__ desired output impedance<br>
 __Zin = Zout__<br><br>
 
diff --git a/pcb_calculator/attenuators/splitter_formula.md b/pcb_calculator/attenuators/splitter_formula.md
index 4219422a16..26b0323384 100644
--- a/pcb_calculator/attenuators/splitter_formula.md
+++ b/pcb_calculator/attenuators/splitter_formula.md
@@ -1,7 +1,7 @@
 ## Splitted attenuator
 ### Attenuation is 6dB
-___Z<sub>in</sub>___ desired input impedance in &#8486;<br>
-___Z<sub>out</sub>___ desired output impedance in &#8486;<br>
+___Z<sub>in</sub>___ desired input impedance in &#x2126;<br>
+___Z<sub>out</sub>___ desired output impedance in &#x2126;<br>
 ___Z<sub>in</sub> = Z<sub>out</sub>___
 
 ___R1 = R2 = R3 = Z<sub>out</sub>/3___
diff --git a/pcb_calculator/attenuators/tee_formula.md b/pcb_calculator/attenuators/tee_formula.md
index 40e92f8185..320e0c68c1 100644
--- a/pcb_calculator/attenuators/tee_formula.md
+++ b/pcb_calculator/attenuators/tee_formula.md
@@ -1,5 +1,5 @@
 ## Tee attenuator
-__Zin__ desired input impedance in &#8486;<br>
+__Zin__ desired input impedance in &#x2126;<br>
 __Zout__ desired output impedance<br>
 __Zin = Zout__<br><br>