Are these regular multiplayer campaigns that someone or yourself made up or are they DCG or BOE or OsFront campaigns? If they are the latter campaigns then you might want to give this a shot!
I just added this patch above to my game and fixed all of my cryillic campaigns that were addons like Battle Over Europe, Osfront, and such...to "English" .....
Depending on how many addons you have in your game then you will have to choose which patch to DL and install...Thanks again to Enjoyr
But read up on these first.....Always remember to back stuff up before you try something new.....this way you always can correct your mistakes