At this time both techtrees and scenarios can be translated for use with MegaGlest 3.8.0 and later.
To make the translation process more convenient for translators, we've added two semi-official projects to Transifex where we take mod developers' and translators' requests to add new open source mods for translation. Currently these semi-official projects are managed by Filux and me, but we're looking for more support from people who have a general idea of how Transifex works or are happy to find out.Techtrees
The semi-official project for translation of MegaGlest techtrees which are not part of the standard MegaGlest distribution lives at:https://www.transifex.com/projects/p/megaglest-mods-techtrees/
Initial documentation (please help improvind it) is available at:http://wiki.megaglest.org/Translations/Unofficial_Techtree_Translations
Techtrees can also be translated outside of Transifex, but be aware that this raises the bar for translators.
Manual mod translation is discussed at: http://wiki.megaglest.org/Translations/Techtrees#Manual_translationScenarios
The semi-official project for translation of MegaGlest sceanrios which are not part of the standard MegaGlest distribution lives at:https://www.transifex.com/projects/p/megaglest-mods-scenarios/
Documentation for scenario translation is not currently available, but you can take a look at the file structure used by the sceanarios included in the standard MegaGlest distribution which are already translated, such as the "Amazones" scenario.