These are not game-breaking problems. They are just cosmetic, but some of them could cause some confusion. These are all in the current version of GalCiv3.
Zone of Control appears in four places in the Ideology Screen (Pragmatic/Vigilant III and Vigilant V and Malevolent/Awe II and Awe III). It should be Zone of Influence.
Directory is Galactic Civilizations III\data\English\Text.
File is CultureTraitText.xml.

ZOC appears in 4 diplomatic modifiers. Here is the code for one of them:
<StringTable>
<Label>ShipInZOCWithoutOpenBorders_Dec</Label>
<String>You have a ship in our ZOC</String>
</StringTable>
I am only counting where ZOC appears between <String> and </String>.
Directory is Galactic Civilizations III\data\English\Text.
File is DiplomaticModifersText.xml.

ZOC may also appear in the UI somewhere since I found it in another file. It appears 3 times in the file, but 2 are between <Label> and </Label>. Here is the code for the other one:
<StringTable>
<Label>AIPriority_Desc_Influence</Label>
<String>Expansion of ZOC and cultural takeover.</String>
</StringTable>
Directory is Galactic Civilizations III\data\English\Text.
File is UIText.xml.
I don't have a screenshot for this.
The name Ascension Gate appears in one of the conversations. It should be Ascension Crystal. Ascension crystals are what appear on the galaxy map. An ascension gate is what has to be built in order to achieve a Technology victory.
Directory is Galactic Civilizations III\data\Game.
File is FlavorText.xml.

The tech trees for the races have a tech named "miniaturization specialization". The words should be capitalized to give "Miniaturization Specialization".
The races are:
Altarian
BRAINY'AK
DLC_Dreadlord
DLC_Peacekeepers
DLC_SpaceMonsters
Drengin
Iconian
Iridium
Krynn
Pirate
Snathi
Terran
Thalan
Yor
Directory is Galactic Civilizations III\data\English\Text.
File is TechDefsText.xml.

In the directory Galactic Civilizations III\data\English\Text, the file ShipClassText.xml has the following errors.
1. The Prototype Scout for the Terrans is described as "ProtoTypeTerranScout". It should be changed to "Prototype Scout".

2. The Dread Lord Transport ship has no description. There is a DreadLordTransport_Class_Name but no DreadLordTransport_Dec.

3. Ten of the races have a tiny ship called Knight. It needs Durantium to be built. The description says it has a Thulium Hull Reinforcement, but it doesn't require Thulium. The Thulium in the description should be changed to Durantium.


The races are:
Terran
Drengin
Altarian
Iridium
Krynn
Yor
Iconian
Thalan
Pirate
Snathi
It is in two places for each race, so it needs to be changed 20 times. Here is the code for the Terrans showing the two places.
<StringTable>
<Label>TerranKnight_Dec</Label>
<String>Short-range but versatile. Equipped with Thulium Hull Reinforcement it can really take a beating.</String>
</StringTable>
<StringTable>
<Label>AIDefenseTerranKnight_Dec</Label>
<String>Short-range but versatile. Equipped with Thulium Hull Reinforcement it can really take a beating.</String>
</StringTable>