WikiLeaks' latest Vault 7 release contains a batch of documents, named 'Marble', which detail CIA hacking tactics and how they can misdirect forensic investigators from attributing viruses, trojans and hacking attacks to their agency by inserted code fragments in foreign languages. The tool was in use as recently as 2016. Per the WikiLeaks release:
"The source code shows that Marble has test examples not just in English but also in Chinese, Russian, Korean, Arabic and Farsi. This would permit a forensic attribution double game, for example by pretending that the spoken language of the malware creator was not American English, but Chinese, but then showing attempts to conceal the use of Chinese, drawing forensic investigators even more strongly to the wrong conclusion, --- but there are other possibilities, such as hiding fake error messages."