Language and culture are inseparable, and language security is closely tied to cultural security. The perspective of cultural communication helps to understand the manifestations of cultural security in the context of the new era, thereby clarifying the relationship between language security and cultural security. Aiming at cultural communication and considering its effectiveness, cultural security in the new era is characterized by the appeal of cultural identity, the vitality of cultural inheritance, and the driving force of cultural innovation. Language security is an intrinsic requirement for national cultural identity, a safeguard for cultural inheritance, and a foundation for cultural innovation and development. Issues of language security not only affect cultural security but also directly influence the effectiveness of cultural communication. Examining the impact of language security on cultural security and cultural communication from the perspectives of linguistic ontological security, linguistic relational security, and linguistic strategic security can provide insights for safeguarding cultural security and promoting cultural communication.