Various typo and grammar fixes - #2331

Changed pages include:

• donate/index.html - view
• privacy/index.html - view
• upcoming-features/index.html - view
• ca/privacy/index.html - view
• ca/upcoming-features/index.html - view
• cs/donate/index.html - view
• da/donate/index.html - view
• de/donate/index.html - view
• docs/client-options/index.html - view
• docs/glossary/index.html - view

There are more changes not included in the list