General:
* Alien: This implies something strange or unfamiliar.
* Exotic: This suggests something unusual or exciting.
* Non-native: This emphasizes that something is not from the same place.
* International: This emphasizes that something is from a different country.
* Overseas: This refers to something that is across the sea or in a distant land.
* Extraneous: This implies something that is external or irrelevant.
Specific to countries/regions:
* International
* Overseas
* Transnational
* Cross-border
* Global
Specific to languages:
* Non-native
* Second-language
* Non-English (or substitute the relevant language)
Specific to objects/concepts:
* Imported: This refers to goods brought in from another country.
* External: This describes something that is from outside a particular system or area.
It's important to consider the specific context in which you are using the word "foreign" to choose the most appropriate synonym.