The localisation process has generally been regarded as a practice implemented after the web development cycle, rather than during the web development cycle as a simultaneous and complementary process. In this regard, ‘accessibilisation' is usually predefined and carried out by non-translation/non-localisation experts during the preliminary phases of web design. This contribution focuses on how complementing localisation expertise with web accessibility (WA) know-how would provide professional localisers with greater communication and technical skills, which, in turn, would help them to achieve a degree of accessibility in the target product comparable with the degree of accessibility achieved in the source product. In order to prove this hypothesis, this contribution introduces a pilot study that investigates the localisation of two web pages – one accessible, one not accessible – with the help of three localisers. The comparative analysis is based on the localisers' knowledge of web accessibility. The results are discussed in terms of web content understandability, of both the source web page (in English) and the target web page (in Spanish).