Technically SAP is a Société Européenne but still somehow the biggest German software developer.
Origin: German, HQ: German, Accounting regime: German, Main stock listing: German, Executive board: 5/6 German
You could try to be boneheaded and comply with whatever standards they need your own way, but that would mean your business partners would need to do more due diligence and expose themselves to risk of what happens if regulators are not happy with the way you conduct your business. So you use SAP.
For instance with Munich Re you have to "pass" their compliance gate which is comprehensive but still has a lot of leeway.