msgcat — Concatenate and merge multiple `.po` translation files. Useful in software localization pipelines to

Combine multiple `.po` files into one

msgcat {{file1.po file2.po ...}} {{[-o|--output-file]}} {{combined.po}}

Combine input files listed in a text file

msgcat {{[-f|--files-from]}} {{path/to/file_list.txt}} {{[-o|--output-file]}} {{combined.po}}

Set the output encoding (e.g. UTF-8)

msgcat {{[-t|--to-code]}} {{UTF-8}} {{input.po}} {{[-o|--output-file]}} {{output.po}}

Output only unique messages (appearing in one file only)

msgcat {{[-u|--unique]}} {{file1.po file2.po ...}} {{[-o|--output-file]}} {{unique.po}}

Use the first available translation for duplicate entries

msgcat --use-first {{file1.po file2.po ...}} {{[-o|--output-file]}} {{output.po}}