While the sign system in IPSL appears to be largely indigenous, elements in IPSL are derived from British Sign Language. For example, most IPSL signers nowadays use fingerspelling based on British Sign Language fingerspelling, with only isolated groups using an indigenous devanagari-based fingerspelling system (for example, Deaf students and graduates of the school for the deaf in Vadodara/Baroda, Gujarat). In addition, more recently contact with foreign Deaf has resulted in rather extensive borrowing from International Signs and (either directly or via International Signs) from American Sign Language. A small number of the Deaf in and around Bengaluru are often said to use American Sign Language (owing to a longstanding ASL deaf school there); however it is probably more correct to say that they use a lexicon based largely on ASL (or Signed English), while incorporating also a not inconsequential IPSL element. Furthermore, regardless of the individual signs used, the grammar used is clearly IPSL and not ASL.