Below are the list of items that need to be taken into consideration while adding a new language into the product base version.
Firstly, the new language must be added as an additional user language and should be added to the User Interface Language table (UILTXT) that can be accessed via
Maintain Codetables.
Necessary source changes are:
Allow new language as user language and for online help
Allow new language for all letters (thus add the new language to every document panel which is also allowed for the current languages DE, ES)
To translate the whole product, it is recommended to do it on a step by step basis:
More information on translation using an external system can be found under Translation Process using external system