In English Teaching, L1 means our first language (e.g. Indonesian) and L2 means our second language (e.g. English). When we try to learn a second language (L2), sometimes the rules from our L1 cause us to make mistakes.
Our expert teachers have extensive experience working with Bahasa learners. This means we have a good idea of what mistakes you will probably make, and can help you improve your English by avoiding these common errors.