This essay studies the translation of metaphorical concepts and lexical variation in relation to walking in a text about hiking in the Lake District. These two linguistic features are deemed to be important in fulfilling the communicative intention of the source text and the aim of the essay is to investigate to what extent these two linguistic features have been retained translation and what motivates different translation strategies. The qualitative study of metaphors focuses on the metaphorical concept THE LAKE DISTRICT IS A PERSON analyses how often different translation strategies are employed when translating metaphors. The results show that which strategy was preferred depended on whether the metaphor was lexicalised or novel and a qualitative analysis aims to explain these differences in preference. A qualitative study of the lexical variation regarding walking between the two languages found the number of different words used to be fairly similar in both languages. Context was determined to be more important than the exact meaning when translating words related to hiking. At times context therefore also motivated a single word to be translated into several different words in the target text or vice versa.

La thèse a pour objet le changement lexical en nez-percé, une langue en danger de l'Idaho (États-Unis)dont le nombre de locuteurs natifs est inférieur à quinze et qui est très peu décrite. L'étude comportedeux axes principaux : la description de la formation des noms de la langue et l'analyse des procédéslexicogéniques employés actuellement dans la création des unités lexicales relatives à l'alimentaire. Aprèsune synthèse linguistique qui renseigne sur la phonologie (plus particulièrement les variations engendréespar les procédés lexicogéniques), l'ordre des constituants et les syntagmes nominaux et verbaux, la thèseétudie la réduplication, la composition, la dérivation affixale (plus spécifiquement les dérivations parsuffixation du morphème de l'analogie et des suffixes ayant subis une conversion catégorielle), et lanominalisation. Puis elle traite de la lexicalisation des métonymies et des métaphores. Enfin, elle analyseles procédés qui conduisent à la création du lexique alimentaire de ces trente dernières années eteffectue une comparaison avec les ressources précédemment identifiées. / The doctoral dissertation analyzes the lexical change in nez perce, an endangered language spoken inIdaho (Unites States of America) that counts less than fifteen native speakers and lacks studies inlexicology. The work is divided into two parts : the description of noun formation, and the analysis of thenew food lexicon. After a synthesis on phonology (modifications due to lexical change), on word order,and on the nominal and verbal clauses, the thesis describes reduplication, compounds, the affixalderivation (especially nouns derived by analogical or converted suffixes) and the lexical nominalisation.Moreover, it deals with the lexicalisations of metonymies and metaphors. Then, it analyzes processes thatlead to the creation of the new food lexicon and compares them with the previously identified processesinvolved in the formation of noun.