List of grammatical/capitalization/stylistic errors in ability/talent descriptions for the NA region (en-us localization)

<> The word "them" is missing after "Stun."

<> There should be a comma after "Hero."

<> In American English, "towards" should be "toward."

<> "When" should be "While."

<> "creates" should be "create."

<> "Hoardapults'" should be "Hoardapult's." Also, "towards" should be "toward."

<> The second use of "blizzard" should be capitalized for consistency with the others (and the name of the ability).

<> "increased" is redundant since it already says "gains."

<> There should be a comma after "damage."

<> There should be a period at the end of the World Breaker tooltip.

<> There is an extra space after the first period.

<> "Abilities" shouldn't be capitalized. Also, the final comma should be a semicolon.

<> There should be a comma after "vision."

<> There should be a comma after "destroyed."

<> "or" should be "and." Also, the "World Breaker" colorization shouldn't be applied to the apostrophe and s, and instead it should be s'.

<> "Ability damage" should be "Spell Damage." Also, it should read "stacks up to 5 times" rather than "stacks 5 times." Also, "per each" should be either "per" or "for each."

<> "on" should be "to." Also, "Immune" shouldn't be capitalized. Also, "you" should be "her" both times. Also, there should be a comma after "location."

<> "Stacks" should be "Stacks up to."

<> "Channel" should not be capitalized for consistency with other in-game usage.

<> There is an extra space after "and."

Going to stop there for now, that's just the top row of newest Heroes. However there are surely more issues to be found with older Heroes.