I'm not quite sure how one is supposed to comment on this sort of change, and I do believe it's needed. I believe that @CyrilleB79 has suggested the following as the text to use in the documentation:
If you set the level on "character", the symbol will not be spoken regardless of the symbol level you are using, except when you navigate by character or when some text is spelt.

I would propose this alternative:
If the level is set to character, the symbol will not be spoken regardless of the symbol level in use, with the following two exceptions:

1. When navigating character by character.
2. When NVDA is spelling any text containing that symbol.

Hello,
Thanks for bringing up this issue.

I have the following comments:

1. I think it is strange to mention only the 'character' option here, as there are also several other options regarding the drop down menue of the level option, e.g., none, all, etc. Could the user guide list out what does each option of the level does? I think the user guide should not assumed that user already know what do the other options do.
2. if the paragraph here is saying that character will be applied to situation where nvda is spelling out a text, please give example, e.g. pressing nvda+up arrow twice

Thanks for the feedback.

I have rephrased the paragraph according to @britechguy and @LittleStar-VIP's comments.

Note: @britechguy, maybe you are not used to reviewing PRs. Going in the tab labeled "Files changed" you will see how the file has been modified in this PR. The modified lines in the file start with + or - indicating if they have been added or removed. Let us know if it's clear for you. And I hope you do not mind this note if you already knew all this.

• PASS: Translation comments check.
• PASS: Unit tests.
• PASS: Lint check.
• FAIL: System tests (tags: installer NVDA). See test results for more information.
• Build (for testing PR): https://ci.appveyor.com/api/buildjobs/yb8bl33fuwcpfj63/artifacts/output/nvda_snapshot_pr14737-27898,f6dd1354.exe
• CI timing (mins):
  INIT 0.0,
  INSTALL_START 0.8,
  INSTALL_END 0.9,
  BUILD_START 0.0,
  BUILD_END 23.6,
  TESTSETUP_START 0.0,
  TESTSETUP_END 0.3,
  TEST_START 0.0,
  TEST_END 18.8,
  FINISH_END 0.1

See test results for failed build of commit f6dd135470

• PASS: Translation comments check.
• PASS: Unit tests.
• PASS: Lint check.
• FAIL: System tests (tags: installer NVDA). See test results for more information.
• Build (for testing PR): https://ci.appveyor.com/api/buildjobs/vdg0ixnq388dtib0/artifacts/output/nvda_snapshot_pr14737-27903,44eb6f19.exe
• CI timing (mins):
  INIT 0.0,
  INSTALL_START 0.8,
  INSTALL_END 0.9,
  BUILD_START 0.0,
  BUILD_END 22.0,
  TESTSETUP_START 0.0,
  TESTSETUP_END 0.3,
  TEST_START 0.0,
  TEST_END 18.8,
  FINISH_END 0.1

See test results for failed build of commit 44eb6f19ff