Learn French: L'étudiante étrangère ne parle jamais français.

Because l'étudiante (the student) is feminine! The masculine word for foreign is étranger. As you're learning in this lesson, to make adjectives ending in -er feminine, you change the ending to -ère.

Why does étrangère come after l'étudiante?

In French, most adjectives go right after the noun they describe. So instead of 'the foreign student', you say 'the student foreign' (l'étudiante étrangère).

How does ne ... jamais work in this sentence?

The phrase ne ... jamais means never. Just like the basic ne ... pas (not), these two words wrap around the conjugated verb. Here, they wrap around parle to make ne parle jamais (never speaks).

Why isn't français capitalized, and where is the word le?

In French, names of languages are written in lowercase. Also, immediately after the verb parler (to speak), it is very common to drop the word for 'the' (le) and simply say parler français, even though you would use it in sentences like J'aime le français.