Students from EU/EEA (European Union/ European Economic Area) countries are allowed to work for up to 20 hours per week during the semester in Germany, just like German students are.
#2 Ireland
In Ireland, students can take up casual employment of up to 20 hours of part-time work per week in term time or up to 40 hours per week during college vacation periods.
#3 Australia
Student visa holders in Australia can work a limited number of hours. From 1 July 2023, student visa holders can work for up to 48 hours a fortnight while studying.