How to localize whole Jamroom project into other language?

// Profile Menu Entry Name
$lang['menu'] = 'audio';

// Keys
$lang[1]  = 'play';
$lang[2]  = 'pause';
$lang[3]  = 'stop';
$lang[4]  = 'mute';
$lang[5]  = 'unmute';
$lang[6]  = 'max volume';
$lang[7]  = 'repeat';
$lang[8]  = 'repeat off';
$lang[9]  = 'create';
$lang[10] = 'title';
$lang[11] = 'Enter a title for the audio file - this will be shown your profile.';
$lang[12] = 'genre';
$lang[13] = 'If you have already entered genres in other audio files, you may select any previous genre, or enter a new genre in text field';
$lang[14] = 'audio file';
$lang[15] = 'select and upload the audio file.';
$lang[16] = 'cover image';
$lang[17] = 'if you would like to associate an image file with this audio file, upload it here. If you do not select a cover image and there is an embedded image in the MP3 file(s), it will be used.';
$lang[18] = 'An error was encountered creating the audio file - please try again.';
$lang[19] = 'The audio file was successfully created!';
$lang[20] = 'Invalid id - please pass in a valid audio id.';
$lang[21] = 'The audio entry was not found in the datastore - please try again.';
$lang[22] = 'create audio file';
$lang[23] = 'update audio file';
$lang[24] = 'update';
$lang[25] = 'The audio file was successfully updated!';
$lang[26] = 'length';
$lang[27] = 'bitrate';
$lang[28] = 'sample rate';
$lang[29] = 'upload a new audio file';
$lang[30] = 'upload a new audio image';
$lang[31] = 'album';
$lang[32] = 'If this audio file is part of an album, enter the album name here.';
$lang[33] = 'Posted a new Audio File';
$lang[34] = 'Albums';
$lang[35] = 'create album';
$lang[36] = 'album audio files';
$lang[37] = 'Select all the audio files that belong to this album - they will be saved individually so they can be edited.';
$lang[38] = 'select audio files';
$lang[39] = 'select cover image';
$lang[40] = 'This audio file is currently being processed and will appear here when complete.';
$lang[41] = 'Audio';
$lang[42] = 'genres';
$lang[43] = 'Flash Required';
$lang[44] = 'previous';
$lang[45] = 'next';
$lang[46] = 'shuffle';
$lang[47] = 'shuffle off';
$lang[48] = 'Update Required';
$lang[49] = 'To play the media you will need to either update your browser to a recent version or update your';
$lang[50] = 'Flash plugin';
$lang[51] = 'streams';
$lang[52] = 'audio tracks';
$lang[53] = 'no audio files were found';
$lang[54] = 'purchase';
$lang[55] = 'Updated an Audio File';
$lang[56] = 'delete album';
$lang[57] = 'Are you sure you want to delete this album?';
$lang[58] = 'You forgot to select an Audio File to upload';
$lang[59] = 'Created a new Audio Album';
$lang[60] = 'modify album';
$lang[61] = 'invalid album name - please try again';
$lang[62] = 'unable to find any audio files that are part of this album';
$lang[63] = 'Updated an Audio Album';
$lang[64] = 'Download this album';
$lang[65] = 'download';
$lang[66] = 'Upload Audio';