I taught someone I knew in a local language by repeatedly pausing an English playlist and translating them and solving their doubts as and when they asked. I explained them questions from problem sets of Java from both "Liang Java 12th ed." and "Cay Horstmann". That guy was able to explain the algorithm immediately. So I taught him enough English for him to speak and write. That is it. He is working in Magazine Company as a Database Admin. He is teaching himself for his career growth.
Second, Reddit is the best place for local language based course learning. Romanian, French, Portugese, German, Italian, Spanish, Chinese, and Vietnamese courses are the only ones I can remember based on popularity. Coursera and EdX usually have CC in about 40 languages, one of which might be your sister's. Moreover, plenty of chrome extensions can now auto-translate video lectures at almost every popular site.
Third, HTML CSS JavaScript is more of a breadth course. Reading, rather than watching should be suggested. Jon Duckett books are top in popularity. The Odin-Project is a track with huge commitment. A video course can be picked from this crowdsourced list - https://reddsera.com/
If she wishes to go Web Dev, Let her dip into Java/Python because theory books and practicing problem sets in her language and jobs in her country are easy to find when it comes to Java.
Most entry level positions which are abundant, are limited to Web Dev, Scrum Master, SysAdmin, QA, etc.
Am I tailoring it right? If not, let me know. Also let me know which country is she be learning in, what languages does she know,
A neatly arranged course can be found in any masters degree course, further free in EU, with similar language constraints.