Why the exception for proper names and technical terms?

Name: Michael Zapp
Email: redaktion@bitvtest.de
Affiliation: BIK (barrierefrei informieren und kommunizieren)
Document: W2
Item Number: Success Criterion 3.1.2
Part of Item: 
Comment Type: technical
Summary of Issue: Why the exception for proper names and technical terms?
Comment (Including rationale for any proposed change):
In Germany English proper names and technical terms are usually pronounced according to English pronounciation rules - so that is how they should be pronounced by screen readers. (Examples: \"Firefox\", \"fieldset\", \"label\" ...)



If a proper name or technical term has not become part of the language mainly used in a web document, the only way to make sure it is pronounced properly is to use the lang attribute. (e.g. <span lang=\"en\">Firefox</span>)

Proposed Change:
Make it clear that proper names and technical terms in different languages also often need to be identified as such using the lang attribute.