Consider Multilingual tax...
When a large percentage of products for a company are produced in one language and dozen languages are to follow for smaller percentage of buyers, this means individual language support is more expensive because of the increased number of engineers who are working the projects.
For example, if there is a product made in China, where 80% of paying consumers are Chinese, and they need to be concerned about an English version, which will sell 20% of their product - there is the additional overhead of supporting English, which means the profit margin is smaller and the company may even take a loss, in order to make their product viable to be purchased in large multi-national corporations (to satisfy a check-box on a requirements document for a capability that may or may not even be used.)
Have you ever read user manuals that were translated from Chinese into other languages? If you need to do that with high quality software, the expectation that translation is done properly is higher, and much more work is done to make the results understandable.
Single language is always cheaper to develop, maintain, and take service calls from, than multi-language software.
Western Europe is, at least, paying for their development & support staffing required for multi-language capabilities through increased software fees.
Piracy in The East (exception of Japan), Eastern Europe, Middle East, Africa, and South America is so rampant - that other multi-lingual nations are paying the price in increased fees, unfortunately.
Software prices would come way down if there was less piracy on the multi-lingual versions of software, and would come down even more if there was only one language with a simple character set (vs strokes or words that need to be re-written when a particular mark appears later in the word as someone is typing.)
One should expect that additional complex features would cost more by the consumer.
Blaming additional cost 100% on exchange rates is weak.
Blaming additional cost on a company for profiteering is weaker.