Is it permissible to work in online text translation, even though communication with clients takes place via WhatsApp or other means?

There is no harm for a woman in working and earning a livelihood that necessitates conversing with men online, provided that Islamic guidelines are observed and she avoids causes of temptation. It is better for her to transition to work that does not require conversing with men, if such is available, as it is safer for her religion and leads to a better outcome.