Downloading a TMX File
Transifex allows you to export the TMX file of a project and use it with an offline translation tool.
To export a TMX file:
Pick the project you want to edit from the project navigation in the Dashboard.
Click on Languages.
Click the Get TMX icon .
In the popup, select the language(s) that you want to download the TMX file for and whether untranslated strings should be included.
Click Download to get your TMX file.
The exported TMX will only contain the latest translation for each source string.
Alternatively, you can head to the General tab of your project settings and click the Download TMX file... link on the right side.
And if you worked offline and used a TM tool, you can upload the updated TMX file to your project.