Does the OSM provide data for street names in different languages? E.g. Spanish and English. If yes, how can I download them?
When you are downloading data from OSM, like polygon or roads, you will have the "names" column written in the common language. However, it is the most likely that you will need to change the encoding of the layer, otherwise it will look like this.
In order of preventing this, you need to go to the layer proprietors.
At the proprietors go to "General" and change the encoding. The "UTF-8" is the most likely be a good choice and the caption will be displayed as they are supposed to be.