INVOICES 5-6 is a Unicode application. This means that you can use the same database to process invoices in different languages, even if they use different code pages.
Use invoice profiles with the correct language in the Character set settings.
Note: Invoice classification using the <SYSTEM> invoice profile assumes the modern basic Latin alphabet (letters in the English alphabet). Thus, the results are poor if fields like OrderNumber or PONumber (which are used to differentiate between general expense invoices and purchase order invoices) contain non-English characters.
If you transfer invoice data to text files, those are saved in ANSI format using the code page that you specify in the Transfer job description.
If an external system is subsequently used to parse the text files, the correct code page must be used. (XML output and output via the INVOICES API use Unicode. In such cases there is no need to consider the code page.)