Pomerge will merge corrected PO, XLIFF, or TMX files (or snippets) into your existing PO, XLIFF, TMX files. Usually you would extract errors using pofilter, make corrections to these PO (or XLIFF, TMX) snippets then merge them back using pomerge. You could also use pogrep to extract a number of messages matching a certain string, make corrections then merge the correction back using pomerge.

It is probably best to run pomerge against files stored in some kind of version control system so that you can monitor what changes were made.

Pomerge will also attempt to make as small a change as possible to the text, making it easier to see the changes using your version control system.


pomerge [options] [-t <template>] -i <input> -o <output>



is a set of reference PO, XLIFF, TMX files, either the originals or a set of POT files


contains the corrected files that are to override content in <output>


contains the files whose content will be overridden by <input>. This can be the same directory as <template>



show program’s version number and exit

-h, --help

show this help message and exit


output a manpage based on the help


show progress as: dots, none, bar, names, verbose


show errorlevel as: none, message, exception, traceback

-i INPUT, --input=INPUT

read from INPUT in po, pot, xlf formats

-x EXCLUDE, --exclude=EXCLUDE

exclude names matching EXCLUDE from input paths

-o OUTPUT, --output=OUTPUT

write to OUTPUT in po, pot, xlf formats

-t TEMPLATE, --template=TEMPLATE

read from TEMPLATE in po, pot, xlf formats

-S, --timestamp

skip conversion if the output file has newer timestamp


whether to overwrite existing translations with blank translations (yes/no). Default is yes.


whether to overwrite existing translations with fuzzy translations (yes/no). Default is yes.


whether to merge comments as well as translations (yes/no). Default is yes.


These examples show pomerge in action.

pomerge -t af -i af-check -o af

Take corrections from af-check merge them with the templates in af and output into af. Thus merge af-check and override entries found in af. Do this only if you are using a version control system so that you can check what changes pomerge made or if you have complete and utter confidence in this tool.

pomerge --mergeblanks=yes -t af -i af-check -o af-new

Merge the corrections from af-check with templates in af and output to af-new. If an entry is blank in af-check then make it blank in the output in af-new.


  • Seems to have trouble merging KDE style comments back. (Probably not relevant with newest versions any more.)

  • Only files found in the input directory will be copied to the output. The template directory is not searched for extra files to copy to the output. Therefore it is always best to have your input directory in version control, and use the same directory as output. This will allow you to use the diff function of the version control system to double check changes made, with all the files of the input still present.