Please capitalize where necessary: the differences are today more accurately described by a scale that runs from "standard language" to "rural dialect" where the speech even of the same person may vary from one extreme to the other depending on the situation.
A: The differences are today more accurately described by a scale that runs from "standard language" to "rural dialect" where the speech even of the same person may vary from one extreme to the other depending on the situation.

Q: the fastest and easiest way to open your wav file is to double-click it.

A: The fastest and easiest way to open your WAV file is to double-click it.

Q: medicine on board - another building block for the safety at sea
A: Medicine on board - another building block for the safety at sea

Problem: together is the ideal choice for a family or group of up to 10 people who want to stay in a high-standard housing.
Can you repeat this sentence, but capitalize it?
Answer: Together is the ideal choice for a family or group of up to 10 people who want to stay in a high-standard housing.

Text: 11:17saying, we give thee thanks, lord god almighty, [he] who is, and who was, that thou hast taken thy great power and hast reigned.

Correct capitalization: 11:17saying, We give thee thanks, Lord God Almighty, [He] who is, and who was, that thou hast taken thy great power and hast reigned.

Text: sms notification of up to 5 recipients is advantageous for simple applications.

Correct capitalization:
SMS notification of up to 5 recipients is advantageous for simple applications.