wikimedia/mediawiki-core

/*!
 * Armenian (Հայերեն) language functions
 */

mw.language.convertGrammar = function ( word, form ) {
    const grammarForms = mw.language.getData( 'hy', 'grammarForms' );
    if ( grammarForms && grammarForms[ form ] ) {
        return grammarForms[ form ][ word ];
    }

    // These rules are not perfect, but they are currently only used for site names so it doesn't
    // matter if they are wrong sometimes. Just add a special case for your site name if necessary.

    switch ( form ) {
        case 'genitive': // սեռական հոլով
            if ( word.slice( -1 ) === 'ա' ) {
                word = word.slice( 0, -1 ) + 'այի';
            } else if ( word.slice( -1 ) === 'ո' ) {
                word = word.slice( 0, -1 ) + 'ոյի';
            } else if ( word.slice( -4 ) === 'գիրք' ) {
                word = word.slice( 0, -4 ) + 'գրքի';
            } else {
                word = word + 'ի';
            }
            break;
    }
    return word;
};