This article presents the first results of the analysis of a literary corpus composed of poems and an essay, as well as their 16 retroversions in French, after translation into 8 languages, typologically and diachronically diversified (Italian, German, Arabic, Farsi, Japanese, Korean, Latin and ancient Greek). This corpus has been studied from an interdisciplinary point of view, mixing textometric data and stylistic observations. Starting from an evaluation of the translational distance between the aligned texts (originals and retroversions), based on length, Dice index and lemma stability, three main hypotheses are tested: are the texts more deeply transformed when they have been retro-translated through a language distant from French? Are the poems more distorted than the prose essay? Can the retro-translated corpus yield hermeneutic clues for the analysis of the original text? In order to study these different aspects from a perspective of corpus linguistics and French stylistics, we propose a methodology of multi-textual alignment and textometric measurements, based on tagging and lemmatisation. The stylistic study is based on these measures to address this rich and complex multi-text. Conducted on a small set, the analysis aims at setting up procedures that can be reproduced on other corpora of translated versions of a text in the same language.