This paper attempts to define cultural globalisation and cultural glocalisation in terms of cultural identity (CI) and language. Homogenisation, heterogenisation and glocalisation are three possible ways to face the challenge of cultural globalisation but glocalisation may be the most realistic solution as it seems to be the way to a better quality of life. The process of exporting CIs to other nations is cultural globalisation while adaptation of incoming foreign CIs to suit local needs is cultural glocalisation. Language is a CI in the domain of lifestyles as well as carrier of CIs of institutional systems and spiritual values. Incoming foreign languages and foreign CIs often cause changes in local CIs. This is an interactive process as changes of any CIs may lead to alterations of other CIs. To be an effective communicator in this multilingual world, people have to develop multilingual and multicultural competencies. The experience of Hong Kong and Singapore in glocalisation of Mandarin and the rapid growth in the number of Mandarin learners and speakers all over the world indicate the potential for development of Mandarin into an international language after English. (Contains 4 figures.)