In Thai, the term 'เป็นต้นไป (pen tôn bpai)' is often used as a way of saying 'and so forth' or 'and so on'. It is typically used to suggest that there are other items, steps, or elements that follow the same pattern or trend, but are not specifically mentioned for brevity or simplicity. This phrase is commonly put at the end of a list or series, indicating the continuation of similar items or actions.