A small update. After reading some more of the forum and thinking a lot about the responses I got in this thread I have some thoughts.
I continue to hold an opinion that there's no such thing as a national stock market as long as it's readily investable from abroad. Thus, for the stock portion I will use total world index ETFs, namely Vanguard FTSE All-World (VWCE) and SPDR MSCI ACWI IMI (IMID).
I'm also still positive that for a PP to truly work in all conditions, the bond part must be invested in US Treasuries (with all due respect to Australia and Canada). Thus, it will be invested in iShares USD Treasury Bond 20+ (DTLA), as it's the only Irish-domiciled fund that holds them.
I did reflect on the currency risk involved in keeping all my cash allocation as US Treasury bills. While in the long term donor country currencies are almost guaranteed to appreciate against the aid beneficiary countries' scrip, short term is important if it's also supposed to serve as an emergency fund, as Harry Browne intended. Many people in my country, including myself, got burned on panic-buying hard currencies that subsequently depreciated in value when it became apparent our government has chickened out of starting a regional war.
Thus I will likely limit my US Treasury bill allocation to 15%. The remaining 10% will consist of a regular emergency fund in local currency (some in literal cash, some in a HYSA), escape fund in USD banknotes (for a kind of emergency situation when local currency
tends to underperform) and Swiss franc assets (hail Cuggino).
There is a new factor to the decision, though: my fiancee. I explained basics of investing to her and sent her some machine-translated articles. I've assumed it will require some work to sell her on any investment that cannot be held in our credit union or under the mattress. Instead, I had to talk her down from a stock-heavy allocation (80% equities, 20% gold, the woman wants her returns). After that she wanted to know what "small cap value" is (it's untranslatable to a language in which buying stocks and gambling in a casino share the same verb). I have a feeling I might end up with a Golden Butterfly.