Command help strings and feedback say "player" when entities are applicable as well

Take a resourcepack and change the text string then! The rest of us don't care if it only says player!

I care. The solution "Use a resource pack" is not a valid solution, just like "Use a mod" isn't. It's still a bug. Confirmed in 1.8.3.

Confirmed for

• 1.8.6

From MC-80769:

Affected commands:
/execute @p ~ ~ ~ /kill You must...which player... (see also MC-78779)
Command block GUI "@r to target random player" (might be wrong as you can add type=!Player)
/help spreadplayers
/help effect
/help testfor
/help tp
Note that it is also inconsistent, for example:
/help kill: /kill [player|entity] (It is a little bit irritating as commands like /replaceitem have <block|entity> as argument)
/help execute: /execute <entity>
/scoreboard teams join <team> [player]
/scoreboard players set <player> <objective> <score> [dataTag]

And all the other scoreboard commands

commands.effect.usage=/effect <entity> <effect> [seconds] [amplifier] [hideParticles] OR /effect <entity> clear
commands.enchant.usage=/enchant <entity> <enchantment ID> [level]
commands.kill.usage=/kill [entity]
commands.tp.usage=/tp [target entity] <destination entity> OR /tp [target entity] <x> <y> <z> [<yaw> <pitch>]
commands.tp.notSameDimension=Unable to teleport because entities are not in the same dimension
commands.scoreboard.players.set.usage=/scoreboard players set <entity> <objective> <score> [dataTag]
commands.scoreboard.players.add.usage=/scoreboard players add <entity> <objective> <count> [dataTag]
commands.scoreboard.players.remove.usage=/scoreboard players remove <entity> <objective> <count> [dataTag]
commands.scoreboard.players.reset.usage=/scoreboard players reset <entity> [objective]
commands.scoreboard.players.reset.success=Reset scores of entity %s
commands.scoreboard.players.resetscore.success=Reset score %s of entity %s
commands.scoreboard.players.list.count=Showing %s tracked entities on the scoreboard:
commands.scoreboard.players.list.empty=There are no tracked entities on the scoreboard
commands.scoreboard.players.list.player.empty=Entity %s has no scores recorded
ommands.scoreboard.players.test.usage=/scoreboard players test <entity> <objective> <min> [max]
commands.scoreboard.players.tag.usage=/scoreboard players tag <entity> <add|remove|list> <tagName> [dataTag]
commands.scoreboard.teams.list.entry=- %1$s: '%2$s' has %3$s members
commands.scoreboard.teams.list.player.count=Showing %s member(s) in team %s:
commands.scoreboard.teams.list.player.empty=Team %s has no members
commands.scoreboard.teams.empty.alreadyEmpty=Team %s is already empty, cannot remove nonexistant members
commands.scoreboard.teams.empty.success=Removed all %s member(s) from team %s
commands.scoreboard.teams.join.usage=/scoreboard teams join <team> [entity]
commands.scoreboard.teams.join.success=Added %s member(s) to team %s: %s
commands.scoreboard.teams.join.failure=Could not add %s member(s) to team %s: %s
commands.scoreboard.teams.leave.usage=/scoreboard teams leave [entity]
commands.scoreboard.teams.leave.success=Removed %s member(s) from their teams: %s
commands.scoreboard.teams.leave.failure=Could not remove %s member(s) from their teams: %s
commands.testfor.usage=/testfor <entity> [dataTag]
commands.spreadplayers.usage=/spreadplayers <x> <z> <spreadDistance> <maxRange> <respectTeams true|false> <entity ...>
commands.spreadplayers.spreading.players=Spreading %s entities %s blocks around %s,%s (min %s blocks apart)
commands.spreadplayers.success.players=Successfully spread %s entities around %s,%s
commands.spreadplayers.info.players=(Average distance between entities is %s blocks apart after %s iterations)
commands.spreadplayers.failure.players=Could not spread %s entities around %s,%s (too many players for space - try using spread of at most %s)

Here's the fixed language lines.

Small note: for team related feedback (like commands.scoreboard.teams.join.success) I changed it to members rather then entities.
Other note, there's a inconsistence looking at spreadplayers (always says playerS or teamS instead of player(s) or team(s), created a seperate ticket for that (MC-106675).

With that also fixed:

commands.spreadplayers.spreading.players=Spreading %s entity (entities) %s blocks around %s,%s (min %s blocks apart)
commands.spreadplayers.success.players=Successfully spread %s entity (entities) around %s,%s

Can confirm for MC 1.12.1.

Is this still an issue post-brigadier? (I don't have time to check myself unfortunately)

All of these seem to be fixed with the new command system in 1.13.