If you want to say "languages' in Spanish, you can use the phrase "lenguajes' (pronounced ñenguajes). This is a common way to refer to languages in formal and informal contexts. In some regions of Spain, especially in Galicia, you might hear "lingus' (pronounced lihngoo), which can sound similar but is not as widely used. As for "linguaes' or "linaguas' (linguages), they are not commonly used in everyday conversations, but you might see them in more formal or technical contexts.
That being said, if you need to specify different forms of language, such as dialects or regional variations, you can use phrases like "lengua popular' (popular language) or "lengua culta' (cultivated language). For example, when talking about the different languages spoken in Latin America, you might say "los lenguas del continente' (the languages of the continent).
It's also worth noting that when referring to languages in a plural sense, you can use the phrase "lengua(s)' or simply ñu enlases (they are languages), depending on the context and region.