Learn Spanish (Spain): ¿Tienes algún plan para este fin de semana?

When alguno comes directly before a masculine singular noun like plan, it drops the final -o and becomes algún. Notice that it also gains an accent mark on the ú to keep the spoken stress on the last syllable.

The English translation says "any plans" (plural), but the Spanish uses algún plan (singular). Why?

In Spanish, it is much more natural to use the singular form (algún plan) when asking if someone has "any" of something in a general sense, whereas English prefers the plural. While you could technically say algunos planes, algún plan is the standard, everyday way to ask this.

Why do we use para instead of por for "for this weekend"?

We use para here because it points to a specific deadline or target time in the future. Think of it as "scheduled for this weekend." You would use por when talking about a duration of time, like "for two days" (por dos días).

Why is the word for "this" este and not esto?

The word fin (end) is a masculine singular noun, so it needs the masculine singular word for "this", which is este. You only use esto when talking about a general situation, an abstract idea, or an unknown object, and it is never placed directly in front of a noun.