Interlingua is an international auxiliary language developed between 1937 and 1951 by the IALA (International Auxiliary Language Association). Its vocabulary and grammar is chiefly derived from five control languages: English, Spanish, Portuguese, French, and Italian.

Source: Tatoeba

It's difficult to learn a foreign language.

It's hard to learn a foreign language.

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It is not easy to learn a foreign language.

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Tom only speaks one language.

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English has become an international language.

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Mastering a foreign language involves a lot of patience.

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It takes us a long time to master a foreign language.

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What's the best way to learn a language?

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Translation is a scholarly discipline.

Translation is a kind of special skill.

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I've heard Italian is a tricky language.

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A programming language is actually like a foreign language.

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Any student of this school must learn one more foreign language besides English.

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You see? You must study a foreign language.

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German is not an easy language.

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Armenian is an Indo-European language.

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To know a language is one thing, and to teach it is another.

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Esperanto is a simple language.

Esperanto is an easy language.

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Arabic is a beautiful language.

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Mastering a foreign language is difficult.

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It's not that easy to learn a new language after fifty.

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An old man does not easily learn a new language.

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