A society of ungendered beings speak English. They have no concept of gender identity, and haven't for thousands of years.
They have all the other concepts we have in English that we use to derive pronouns from:
- Speaker vs audience: "I / Me" vs "You".
- Inanimate vs living : "It" vs "they"
- Nearer object vs other object :"This" vs "That"
- Group containing speaker vs excluding speaker: "We / us" vs "They / them"
What they are missing is two shorthand placeholders in the language allowing for beings to be temporarily identified in context by their gender: "Steven and Sarah are visiting me tomorrow. He is bringing the drinks, she is bringing the snacks. His car broke down on him so he'll be late!".
The mention of "Steven" automatically assigns that subject to the "He" placeholder for the rest of the paragraph, and "Sarah" gets automatically assigned to the "She" placeholder for the rest of the paragraph. This ability to compress language by assigning people to short single-syllable placeholders is lost if gender is removed - and replacing both guests with "they" leads to unambiguity.
The only solutions I see (without modifying the language) is to either structure communication such that "they" remains unambiguous (split the guests plans apart into two separate sentences with no cross over), or call everyone by name each time they're referenced. Both are inefficient, and I'm aware languages tend to evolve out inefficiencies, suggesting to me that some other concept will be used to partition members of a society, or some other way will be used such that 2 or more subjects can be referenced unambiguously efficiently within a short context.
If not gender, what would an English-speaking society use to replace the convenience of the missing single-syllable gendered pronouns?
Whether they have a biological sex / reproduce sexually / have genitals is definitely irrelevant to the question - in the society the concept of classifying people by genital shape makes as much sense to them as splitting Earth society by shoe size or belly button radius.
For the actual structure / biology / tech level / etc of the society I'm not sure how much it actually matters, I'd prefer an abstract answer ideally, but setting and language are linked so for those who want to base their answer on appearance or history I'm going to declare them highly advanced humanoids that have converged in appearance. Think like the Asguard from SG1 - can no longer reproduce sexually due to over-the-top-genetic-engineering so appear essentially uniform. The concept of gender was forgotten long ago in their history, but they have different abilities, knowledge, personalities, behaviours, quirks, status, etc.
Ideas I've had:
- Seniority vs equivalence vs Inferiority. Master / Peer / Subservient style placeholders.
- "Steve and servant Sarah are working on that. Mas is worried but sub knows the system back to front and sub just finished that training course."
- Order of reference. Kind of like we do with "Former" vs "Latter".
- "Steve and Sarah are working on that. 2 knows 2's stuff and can alleviate 1's worrys because 2 just did that training course".
- Like "this" and "that" change which placeholder they refer to by a single vowel change, you could vary the they/them pronoun to create a few more. Tha/Tham, Tho/Thom. These unfortunately need to be defined explicitly every time they're used however, although it could be mixed with they which is implicitly defined:
- "Steve (Tha) and Sarah are working on that. They knows their stuff and can alleviate tha's worry's - tha just paid for that course they did so they can work hard for tham".
- Those 6 pronouns get dropped and everyone just works around it using stricter grammer rules.
- Adopt the explicit gender-neutral pronoun Ze/zir, however the distinction between (they) "undefined gender" and (Ze) "defined gender neutral" is meaningless on a world with no gender at all - they could be used interchangeably.
- Replace pronoun with a personal defined choice from an agreed upon list. This knowledge must be shared in advance with all parties communicating however. "Sarah uses Tha pronoun. Steven uses Thi pronoun."
- Use nicknames. Someone's nickname must be shared in advance too however.