For the three first, they are default maps, so it's a little different:
In data\world\maps\custom, open each folder and just change the names in the descr_battle.txt like this
Code:
; Custom battle script generated by Romans Battle Editor
battle Plaine herbeuse
playable
end
nonplayable
end
Nevertheless the accents are not working in this file (they will be replaced with symbols).
For the after alexandros one, no idea; the commas are probably a part of the problem.
Sinon, oui, et lire dans une autre langue met une distance qui nuit un peu à l'immersion, même si on a un niveau correct.