How should I handle "removed" or "disused" strings?

[toggledbits]

Removed or disused strings should not be physically removed from your translation files. In order to make your file compatible with the largest number of Reactor revisions possible, the string should remain in the translation file. It is recommended that you move the disused string to the bottom of your translation file under a comment heading # disused since <version>, where version is the version number (shown in the CHANGELOG) at which the string became disused.

For other recommendations on procedures, please see Localization in the docs.