I see sorting problems with characters other than Latin (of course this problems can be also solved)

Different lists means that the items can be different in the two lists, such as TermX is in list 1 but not in list 2. The problem can easily be solved: considering only terms that are in both lists, or giving a x-value to terms that are missing in one of the two lists. Remember, the goal of the script is reranking the terms in the 2 lists.