[[AK]Nazgul]

Yep, I'd do it like this
Create a new array

pawn Код:

new language[MAX_PLAYERS];

//When the player chooses language a
language[playerid] = 1;
//Choose language b
language[playerid] = 2;

Now, everytime something is written, do this

pawn Код:

switch(language[playerid])
{
    case 1: //display msg in language a
    case 2: //display msg in language b
}