A localization mapping logic. Check http://jsfiddle.net/V92cK/5/ for a demo.

l10n-helper.js

var Obj = '{"my":"मेरो","name": "नााम","is-xyz": "xyz-हो",".":"।","1":"१","2":"२","3":"३","4":"४","5":"५","6":"६","7":"७","8":"८","9":"९","0":"०"}';

//^^ The Localisation Objecy (Read from file or any other source)

ObjReal = JSON.parse(Obj);  //Parsing the JSON


//The function starts
var l10n = function(localeObject, content){
	var arr = content.split(" ").reverse(); //Split by space. and reverse (actually non-reversed) the order
	var newArr =[];                         //Container
	for (var i = arr.length - 1; i >= 0; i--) {
              // if the word does not have one-to-one mapping:
		if(localeObject[arr[i]] == undefined){
		        if(isNaN(Number(arr[i]))){
                              //^^ if the word is not a number
				newArr.push(arr[i]); //do not translate.
			} else { //if the word is collection of digits
                                var nums = arr[i].split('').reverse(); //Same old split and (non)-reverse
				var convNums = [];                    //Same old container
				for (var j = nums.length - 1; j >= 0; j--) {
					convNums.push(localeObject[nums[j]]);
                                        //iterate and push digits
				}
				newArr.push(convNums.join('')); //Make those digits a word! :)
			}
		} else { //This means the word has a one-to-one mapping:
			newArr.push(localeObject[arr[i]]);
		}        
	}
	return newArr.join(" "); //Join all with spaces.
};

//The magic 
alert(l10n(ObjReal, "my name is-xyz as . 123 456 7 8"));