Learn Romanian: Casa este acolo. - The house is there.

The base dictionary word for "house" is casă. In Romanian, the word for "the" (the definite article) is attached to the end of the noun rather than being a separate word. For most feminine nouns ending in -ă, you change the -ă to -a to say "the". So, casă (a house) becomes casa (the house).

How do I pronounce casa compared to casă? Does the emphasis change?

The emphasis stays on the first syllable for both words: CA-sa. The only difference is that final vowel sound. Instead of the relaxed "uh" sound at the end of casă, you make a clear, open "ah" sound at the end of casa.

Could I use e instead of este in this sentence?

Yes, absolutely! E is the shorter, more informal version of este (is). Saying Casa e acolo is very common in everyday spoken Romanian and means exactly the same thing.

Does the word acolo change if I am talking about a masculine noun instead of a feminine one?

No, acolo (meaning "there") is an adverb. Adverbs describe where, when, or how something happens, and they do not have gender or plural forms in Romanian. Acolo will always stay exactly the same, no matter what object you are pointing out.