Latvia
noun: Latvian(s)
adjective: Latvian

Lebanon
noun: Lebanese (singular and plural)
adjective: Lebanese

Lesotho
noun: Mosotho (singular), Basotho (plural)
adjective: Basotho

Liberia
noun: Liberian(s)
adjective: Liberian

Libya
noun: Libyan(s)
adjective: Libyan

Liechtenstein
noun: Liechtensteiner(s)
adjective: Liechtenstein

Lithuania
noun: Lithuanian(s)
adjective: Lithuanian

Luxembourg
noun: Luxembourger(s)
adjective: Luxembourg

Macau
noun: Chinese
adjective: Chinese

Macedonia
noun: Macedonian(s)
adjective: Macedonian