This study intends to find what are the experiences of international students semiotically adapting to unfamiliar signs in the United Kingdom before and during the COVID-19 pandemic. Semi-structured interviews were conducted with six international university students to learn about their experiences of adapting to a new country. Data were analysed using thematic analysis. Two themes were classified as dialogical self in interpersonal adaptation and linguistic elements of semiotic adaptation, each with two subthemes. Participants’ experiences of merging self-constructs seem reflective of proculturation theory. The researchers termed ‘language bridges’ to refer to social representations dependent on language-specific signs. Some of the participants’ self-constructs relied on signs not provided by the environment during the COVID-19 pandemic. Overall, proculturation offers insight into the complex psychological and social processes of adapting to unfamiliar signs.