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diff --git a/resources/src/mediawiki.language/mediawiki.language.numbers.js b/resources/src/mediawiki.language/mediawiki.language.numbers.js
new file mode 100644
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+++ b/resources/src/mediawiki.language/mediawiki.language.numbers.js
@@ -0,0 +1,258 @@
+/*
+ * Number-related utilities for mediawiki.language.
+ */
+( function ( mw, $ ) {
+	/**
+	 * @class mw.language
+	 */
+
+	/**
+	 * Pad a string to guarantee that it is at least `size` length by
+	 * filling with the character `ch` at either the start or end of the
+	 * string. Pads at the start, by default.
+	 *
+	 * Example: Fill the string to length 10 with '+' characters on the right.
+	 *
+	 *     pad( 'blah', 10, '+', true ); // => 'blah++++++'
+	 *
+	 * @private
+	 * @param {string} text The string to pad
+	 * @param {number} size The length to pad to
+	 * @param {string} [ch='0'] Character to pad with
+	 * @param {boolean} [end=false] Adds padding at the end if true, otherwise pads at start
+	 * @return {string}
+	 */
+	function pad( text, size, ch, end ) {
+		if ( !ch ) {
+			ch = '0';
+		}
+
+		var out = String( text ),
+			padStr = replicate( ch, Math.ceil( ( size - out.length ) / ch.length ) );
+
+		return end ? out + padStr : padStr + out;
+	}
+
+	/**
+	 * Replicate a string 'n' times.
+	 *
+	 * @private
+	 * @param {string} str The string to replicate
+	 * @param {number} num Number of times to replicate the string
+	 * @return {string}
+	 */
+	function replicate( str, num ) {
+		if ( num <= 0 || !str ) {
+			return '';
+		}
+
+		var buf = [];
+		while ( num-- ) {
+			buf.push( str );
+		}
+		return buf.join( '' );
+	}
+
+	/**
+	 * Apply numeric pattern to absolute value using options. Gives no
+	 * consideration to local customs.
+	 *
+	 * Adapted from dojo/number library with thanks
+	 * <http://dojotoolkit.org/reference-guide/1.8/dojo/number.html>
+	 *
+	 * @private
+	 * @param {number} value the number to be formatted, ignores sign
+	 * @param {string} pattern the number portion of a pattern (e.g. `#,##0.00`)
+	 * @param {Object} [options] If provided, both option keys must be present:
+	 * @param {string} options.decimal The decimal separator. Defaults to: `'.'`.
+	 * @param {string} options.group The group separator. Defaults to: `','`.
+	 * @return {string}
+	 */
+	function commafyNumber( value, pattern, options ) {
+		options = options || {
+			group: ',',
+			decimal: '.'
+		};
+
+		if ( isNaN( value) ) {
+			return value;
+		}
+
+		var padLength,
+			patternDigits,
+			index,
+			whole,
+			off,
+			remainder,
+			patternParts = pattern.split( '.' ),
+			maxPlaces = ( patternParts[1] || [] ).length,
+			valueParts = String( Math.abs( value ) ).split( '.' ),
+			fractional = valueParts[1] || '',
+			groupSize = 0,
+			groupSize2 = 0,
+			pieces = [];
+
+		if ( patternParts[1] ) {
+			// Pad fractional with trailing zeros
+			padLength = ( patternParts[1] && patternParts[1].lastIndexOf( '0' ) + 1 );
+
+			if ( padLength > fractional.length ) {
+				valueParts[1] = pad( fractional, padLength, '0', true );
+			}
+
+			// Truncate fractional
+			if ( maxPlaces < fractional.length ) {
+				valueParts[1] = fractional.slice( 0, maxPlaces );
+			}
+		} else {
+			if ( valueParts[1] ) {
+				valueParts.pop();
+			}
+		}
+
+		// Pad whole with leading zeros
+		patternDigits = patternParts[0].replace( ',', '' );
+
+		padLength = patternDigits.indexOf( '0' );
+
+		if ( padLength !== -1 ) {
+			padLength = patternDigits.length - padLength;
+
+			if ( padLength > valueParts[0].length ) {
+				valueParts[0] = pad( valueParts[0], padLength );
+			}
+
+			// Truncate whole
+			if ( patternDigits.indexOf( '#' ) === -1 ) {
+				valueParts[0] = valueParts[0].slice( valueParts[0].length - padLength );
+			}
+		}
+
+		// Add group separators
+		index = patternParts[0].lastIndexOf( ',' );
+
+		if ( index !== -1 ) {
+			groupSize = patternParts[0].length - index - 1;
+			remainder = patternParts[0].slice( 0, index );
+			index = remainder.lastIndexOf( ',' );
+			if ( index !== -1 ) {
+				groupSize2 = remainder.length - index - 1;
+			}
+		}
+
+		for ( whole = valueParts[0]; whole; ) {
+			off = groupSize ? whole.length - groupSize : 0;
+			pieces.push( ( off > 0 ) ? whole.slice( off ) : whole );
+			whole = ( off > 0 ) ? whole.slice( 0, off ) : '';
+
+			if ( groupSize2 ) {
+				groupSize = groupSize2;
+				groupSize2 = null;
+			}
+		}
+		valueParts[0] = pieces.reverse().join( options.group );
+
+		return valueParts.join( options.decimal );
+	}
+
+	$.extend( mw.language, {
+
+		/**
+		 * Converts a number using #getDigitTransformTable.
+		 *
+		 * @param {number} num Value to be converted
+		 * @param {boolean} [integer=false] Whether to convert the return value to an integer
+		 * @return {number|string} Formatted number
+		 */
+		convertNumber: function ( num, integer ) {
+			var i, tmp, transformTable, numberString, convertedNumber, pattern;
+
+			pattern = mw.language.getData( mw.config.get( 'wgUserLanguage' ),
+				'digitGroupingPattern' ) || '#,##0.###';
+
+			// Set the target transform table:
+			transformTable = mw.language.getDigitTransformTable();
+
+			if ( !transformTable ) {
+				return num;
+			}
+
+			// Check if the 'restore' to Latin number flag is set:
+			if ( integer ) {
+				if ( parseInt( num, 10 ) === num ) {
+					return num;
+				}
+				tmp = [];
+				for ( i in transformTable ) {
+					tmp[ transformTable[ i ] ] = i;
+				}
+				transformTable = tmp;
+				numberString = num + '';
+			} else {
+				numberString = mw.language.commafy( num, pattern );
+			}
+
+			convertedNumber = '';
+			for ( i = 0; i < numberString.length; i++ ) {
+				if ( transformTable[ numberString[i] ] ) {
+					convertedNumber += transformTable[numberString[i]];
+				} else {
+					convertedNumber += numberString[i];
+				}
+			}
+			return integer ? parseInt( convertedNumber, 10 ) : convertedNumber;
+		},
+
+		/**
+		 * Get the  digit transform table for current UI language.
+		 * @return {Object|Array}
+		 */
+		getDigitTransformTable: function () {
+			return mw.language.getData( mw.config.get( 'wgUserLanguage' ),
+				'digitTransformTable' ) || [];
+		},
+
+		/**
+		 * Get the  separator transform table for current UI language.
+		 * @return {Object|Array}
+		 */
+		getSeparatorTransformTable: function () {
+			return mw.language.getData( mw.config.get( 'wgUserLanguage' ),
+				'separatorTransformTable' ) || [];
+		},
+
+		/**
+		 * Apply pattern to format value as a string.
+		 *
+		 * Using patterns from [Unicode TR35](http://www.unicode.org/reports/tr35/#Number_Format_Patterns).
+		 *
+		 * @param {number} value
+		 * @param {string} pattern Pattern string as described by Unicode TR35
+		 * @throws {Error} If unable to find a number expression in `pattern`.
+		 * @return {string}
+		 */
+		commafy: function ( value, pattern ) {
+			var numberPattern,
+				transformTable = mw.language.getSeparatorTransformTable(),
+				group = transformTable[','] || ',',
+				numberPatternRE = /[#0,]*[#0](?:\.0*#*)?/, // not precise, but good enough
+				decimal = transformTable['.'] || '.',
+				patternList = pattern.split( ';' ),
+				positivePattern = patternList[0];
+
+			pattern = patternList[ ( value < 0 ) ? 1 : 0] || ( '-' + positivePattern );
+			numberPattern = positivePattern.match( numberPatternRE );
+
+			if ( !numberPattern ) {
+				throw new Error( 'unable to find a number expression in pattern: ' + pattern );
+			}
+
+			return pattern.replace( numberPatternRE, commafyNumber( value, numberPattern[0], {
+				decimal: decimal,
+				group: group
+			} ) );
+		}
+
+	} );
+
+}( mediaWiki, jQuery ) );