Good idea
As this mode re-uses the uchronic campaign (for TOW 1 without mod), it has been translated (Eniced did it if I remember well).
So you can re use the translation.
But it concerns only the part till 1940.
The 4 new missions added to the uchronic campaign with the mod have no translation (UC_DG_12_41 to UC_DG_15_42)
If you can translate them, I can make a new english package, and add what you already did
For your last question, your are right, it is not necessary to save, as it continues ! You can change this in the translation.