1. In two languages.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• biligual,
• bilibgual,
• bilungual,
• bilngual,
• bilinguial,
• billingual,
• bilengual,
• bilangual,
• bilinqual,
• bilingue,
• binlingual,
• bilingulal,
• bilingal,
• bilagual,
• blingual,
• bilinigual,
• bilingul,
• bilinguel,
• biliingual,
• bylingual

• billing,
• billings,
• billingsgate,
• billington,
• billingslea,
• Billingsly,
• Billingsley,
• bilingually,
• billowing,
• boiling.

The adjective form of the word "bilingual" is "bilingual".

The plural of the "bilingual" can be the "bilinguals".

The singular of the "bilingual" can be the "bilingual".