Many countries have national libraries with web services that provide metadata (mainly of local books). Most of these services use the SRU protocol developed by LoC. It is very easy to grab for instance isbnlib-bnf and make a new plugin for books in your language. A list of libraries that use this protocol could be found here (https://www.bibliotechzw.com/wp-content/uploads/2016/09/z3950-server-list.pdf).
Sources: [enter here url for web services were we can get metadata for books]
Books in your language
Many countries have national libraries with web services that provide metadata (mainly of local books). Most of these services use the SRU protocol developed by LoC. It is very easy to grab for instance isbnlib-bnf and make a new plugin for books in your language. A list of libraries that use this protocol could be found here (https://www.bibliotechzw.com/wp-content/uploads/2016/09/z3950-server-list.pdf).
Sources: [enter here url for web services were we can get metadata for books]