src/Mod/TechDraw/Templates/ISO/localized/README.md
This folder (locale) contains translations for TechDraw workbench templates in the parent Templates folder.
The name of each locale subfolder represents a language, which follows IETF BCP 47 standardized codes. The original TechDraw templates in the parent folder are written using American English (en-US).
As such, the most basic name for a locale subfolder will include an ISO 639 language code (e.g. de for German). If it's necessary, additional subtags can be added to describe language variants. For instance variants spoken in a particular country, or a specific script. Those subtags are combinable and are based in other standards.
The most common additional subtag is an additional country code to describe a regional variant of the language (e.g. de-DE for German spoken in Germany, es-AR for Spanish spoken in Argentina, or zh-CN for Simplified Chinese in Mainland China). Country subtags are based on the ISO 3166-1 standard's country codes.
To add a translation:
ll or ll-CC (where ll is a 2-letter or 3-letter ISO 639 language code, and CC is a 2-letter ISO 3166-1 country code).Templates folder that you want to translate to your new folder.Use the FreeCAD forum if you need further help.