Strings referencing the player's off hand are inconsistently spelled

The Bug:

Strings referencing the player's off hand are inconsistently spelled.

For clarifaction reasons, "off hand" is the correct spelling here.

Affected Strings:

Before reading the table, please note the following:

• Words colored in GREEN are correct.
• Words colored in RED are incorrect.

 

Steps to Reproduce:

1. Display any of the affected strings as listed above by using the command provided below and replacing "XYZ" with the string's translation key.

   /tellraw @s {"translate":"XYZ"}

2. Observe the string's spelling.

Observed Behavior:

The spelling across strings is inconsistent.

Expected Behavior:

The spelling across strings would be consistent.