• Pragmatic development centers on intentional communication and discourse functions, tracing early performatives, holophrases, requests, and context-driven speech acts as scaffolds for later grammar [7] [6] [13] [14] [16].

• Deixis and locative semantics emerge through cross‑linguistic patterns, revealing a staged acquisition of spatial terms (in/on/under) and navigational references across English, Italian, Serbo-Croatian, Turkish [3] [12] [18].

• Processing vs production shows comprehension can precede production in telegraphic-age tasks, with evidence from syntax discrimination, sentence imitation, semantic interference, and intonation effects [5] [10] [11] [8].

• Parent input and social context shape early language trajectories, evidenced by mothers' speech patterns, prosodic features, and parent‑guided treatment programs [2] [19] [16] [14].

• Cross-language and multilingual contexts influence early language structure and use, with cross-language locatives and bilingual prosodic features shaping acquisition [12] [19] [15].