Please capitalize where necessary: it then used a latin alphabet until 1938 which was replaced by a cyrillic alphabet.
A: It then used a Latin alphabet until 1938 which was replaced by a Cyrillic alphabet.

Q: before buying a vacuum cleaner karcher ds 5600 specify all your options, equipment, appearance and warranty from the seller. please note that we are not engaged in the sale and manufacture warranty.

A: Before buying a vacuum cleaner Karcher DS 5600 specify all your options, equipment, appearance and warranty from the seller. Please note that we are not engaged in the sale and manufacture warranty.

Q: cast off remaining sts when piece measures 60-61-62 (62-65) cm.
A: Cast off remaining sts when piece measures 60-61-62 (62-65) cm.

Problem: be friendly, have empathy, be generous with praise, be genuine.
Can you repeat this sentence, but capitalize it?
Answer: Be friendly, have empathy, be generous with praise, be genuine.

Text: your outlook on life is likely to change and deepen over the next months, more through a subtle shift in your perceptions than through any particular event or crisis which might force you to alter your viewpoint.

Correct capitalization: Your outlook on life is likely to change and deepen over the next months, more through a subtle shift in your perceptions than through any particular event or crisis which might force you to alter your viewpoint.

Text: both consumer and commercial revenues were up, hard to do when you're profitable at 4.3% margin.

Correct capitalization:
Both consumer and commercial revenues were up, hard to do when you're profitable at 4.3% margin.