QT Linguist ts file names in pro file

Question

How does QT Linguist know the ts file defined in the project file is for a specific language? (Is the "_ja" characters in the name how it determines the language? I couldn't find anything in the documentation.)

I have a ts file defined as "testdata_ja.ts" in the project file. Running lupdate, the file is generated. In the ts file there is a line:

<TS version="2.1" language="ja_JP">

lupdate seemed to figure it out, but nothing was translated, all entries are "unfinished". I put an entry in the code that was in the Japanese phrase book.

Answer 1

The phrasebook is just a hint/help for the human translator, lupdate will never automatically translate anything for you. Any translations in the .ts file still need to be populated and/or marked as completed "manually" (typically in QtLinguist, but one could use any text editor, or a script, or whatever).