Regardless of where is a common phrase used in English. However, there are various synonyms available that can be used instead of this phrase. One alternative is the word "irrespective." It means without regard to something. Another possible synonym is "wheresoever." It is an old English word used to mean wherever. You can also use the word "wherever" or "in any location." Moreover, phrases like "no matter where" and "in every place" express the same meaning. Ultimately, using different synonyms helps in making your writing or speech more engaging and diverse, and serves to emphasize the point you are making.